【科普篇】你真的了解网线吗？
<section style="background-color: rgb(255, 255, 255);box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="transform: rotate(0deg);-webkit-transform: rotate(0deg);-moz-transform: rotate(0deg);-o-transform: rotate(0deg);padding: 10px;margin-left: 1em;margin-right: 1em;background-color: rgb(250, 243, 227);box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin-right: 0%;margin-left: 0%;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section></section><section class="" style="width: 100%;padding-top: 1em;margin-top: -1em;border-radius: 0.5em 0.5em 1em 1em;background-color: rgb(194, 218, 252);box-sizing: border-box;"><section class="" style="width: 100%;border-radius: 0px 0px 0.5em 0.5em;background-color: rgb(253, 186, 175);padding: 10px;font-size: 14px;color: rgb(255, 255, 255);line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;"> </p><p style="box-sizing: border-box;">首先，问大家一个问题~在安防工作中，你接触的最多的是什么？</p><p style="box-sizing: border-box;"><span style="letter-spacing: 1.2px;">没错！就是今天的主角——网线。</span></p><p style="box-sizing: border-box;">在这个春暖花开的好时节，小编我来给大家科普一下网线的原理以及如何正确区分优劣网线。</p><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin: 10px 0%;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;vertical-align: top;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;width: 10%;border-width: 1px;border-radius: 0px;border-style: solid;border-color: rgb(62, 62, 62);background-color: rgb(203, 230, 249);padding-top: 4px;padding-bottom: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section><section class="" style="display: inline-block;vertical-align: top;width: 26%;border-style: solid solid solid none;border-width: 1px;border-radius: 0px;border-color: rgb(62, 62, 62);background-color: rgb(255, 205, 209);padding-top: 4px;padding-bottom: 4px;box-shadow: rgb(0, 0, 0) 0px 0px 0px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: -25px;margin-right: 0%;margin-left: 0%;transform: translate3d(-8px, 0px, 0px);text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;width: 10%;border-width: 1px;border-radius: 0px;border-style: solid;border-color: rgb(62, 62, 62);background-color: rgb(254, 255, 255);padding: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="font-size: 18px;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">①</strong></p></section></section></section></section><section class="" style="display: inline-block;vertical-align: top;width: 26%;border-style: solid solid solid none;border-width: 1px;border-radius: 0px;border-color: rgb(62, 62, 62);background-color: rgb(254, 255, 255);padding: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">网线科普</strong></p></section></section></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;border-width: 1px;border-style: solid;border-color: rgb(249, 110, 87);padding: 10px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;"> </p><p style="box-sizing: border-box;"><span style="font-size: 14px;">网线的作用从广义上来讲，主要是用来连接局域网。</span></p><p style="box-sizing: border-box;"><span style="font-size: 14px;">网线的分类主要有<span style="font-size: 14px;color: rgb(255, 134, 142);box-sizing: border-box;">双绞线、同轴电缆、光缆</span>三种，<span style="font-size: 14px;color: rgb(255, 134, 142);box-sizing: border-box;">同轴电缆、光缆</span>也属于网线的一种。 </span></p><p style="box-sizing: border-box;"><span style="font-size: 14px;letter-spacing: 1.2px;">当然，目前我们监控项目中说的网线，主要是指双绞线。双绞线是由许多对线组成的数据传输线。特点是价格便宜，所以被广泛使用。</span></p><p style="box-sizing: border-box;"><span style="font-size: 14px;">所以今天，我们就来重点讲一讲双绞线~</span></p><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin: 10px 0%;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;vertical-align: top;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;width: 10%;border-width: 1px;border-radius: 0px;border-style: solid;border-color: rgb(62, 62, 62);background-color: rgb(203, 230, 249);padding-top: 4px;padding-bottom: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section><section class="" style="display: inline-block;vertical-align: top;width: 26%;border-style: solid solid solid none;border-width: 1px;border-radius: 0px;border-color: rgb(62, 62, 62);background-color: rgb(255, 205, 209);padding-top: 4px;padding-bottom: 4px;box-shadow: rgb(0, 0, 0) 0px 0px 0px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: -25px;margin-right: 0%;margin-left: 0%;transform: translate3d(-8px, 0px, 0px);text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;width: 10%;border-width: 1px;border-radius: 0px;border-style: solid;border-color: rgb(62, 62, 62);background-color: rgb(254, 255, 255);padding: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="font-size: 18px;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">②</strong></p></section></section></section></section><section class="" style="display: inline-block;vertical-align: top;width: 26%;border-style: solid solid solid none;border-width: 1px;border-radius: 0px;border-color: rgb(62, 62, 62);background-color: rgb(254, 255, 255);padding: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">双绞线</strong></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;border-width: 1px;border-style: solid;border-color: rgb(249, 110, 87);padding: 10px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;box-sizing: border-box;"><section style="display: inline-block;vertical-align: middle;width: 1.5em;height: 1.5em;border-radius: 50%;background-color: rgb(249, 110, 87);box-sizing: border-box;"></section><section style="display: inline-block;vertical-align: middle;margin-left: -0.8em;width: 0px;border-right: 1em solid rgb(255, 255, 255);border-top: 0.6em solid transparent !important;border-bottom: 0.6em solid transparent !important;box-sizing: border-box;"></section></section><section class="" style="display: inline-block;vertical-align: middle;color: rgb(180, 160, 67);box-sizing: border-box;"><p style="box-sizing: border-box;">什么是双绞线</p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin: 10px 0% 20px;box-sizing: border-box;"><section class="" style="display: inline-block;width: 97%;vertical-align: top;box-shadow: rgb(140, 140, 140) 0px 0px 3px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;vertical-align: top;padding-top: 15px;padding-right: 15px;padding-left: 15px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-right: 0%;margin-left: 0%;box-sizing: border-box;"><section class="" style="text-align: left;font-size: 14px;line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;">双绞线采用了一对互相绝缘的金属导线对绞的方式，来抵御频率小于25MHz以下电磁波干扰。</p><p style="box-sizing: border-box;">把两根绝缘的铜导线按一定密度互相绞在一起，可以降低信号干扰的程度，每一根导线在传输中辐射的电波会被另一根线上发出的电波抵消。</p><p style="box-sizing: border-box;">一般来说，<span style="color: rgb(255, 134, 142);box-sizing: border-box;">线绞的越密，其抗干扰能力就越强</span>。“双绞线”的名字也是由此而来。</p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;font-size: 14px;line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;">双绞线可分为屏蔽双绞线（STP)和非屏蔽双绞线（UTP)。两者区别如下图所示：</p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;line-height: 1.9;font-size: 12px;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;">注： 我们监控中使用的一般都是非屏蔽类的双绞线.<br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-right: 0%;margin-left: 0%;box-sizing: border-box;"><section class="" style="text-align: left;font-size: 14px;line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-right: 0%;margin-bottom: -16px;margin-left: 0%;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;box-shadow: rgb(0, 0, 0) 0px 0px 0px;overflow: hidden !important;box-sizing: border-box;"></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 0.5em;margin-bottom: 0.5em;box-sizing: border-box;"><section class="" style="display: inline-block;float: left;width: 45%;margin-top: 0.2em;border-width: 1px;border-style: dotted;border-color: rgb(249, 110, 87);box-sizing: border-box;"></section><section class="" style="display: inline-block;float: right;width: 45%;margin-top: 0.2em;border-width: 1px;border-style: dotted;border-color: rgb(249, 110, 87);box-sizing: border-box;"></section><section class="" style="width: 0.5em;height: 0.5em;margin: auto;box-sizing: border-box;"><section style="transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);-o-transform: rotate(45deg);box-sizing: border-box;"><section style="width: 0.5em;height: 0.5em;background-color: rgb(249, 110, 87);box-sizing: border-box;"></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;box-sizing: border-box;"><section style="display: inline-block;vertical-align: middle;width: 1.5em;height: 1.5em;border-radius: 50%;background-color: rgb(249, 110, 87);box-sizing: border-box;"></section><section style="display: inline-block;vertical-align: middle;margin-left: -0.8em;width: 0px;border-right: 1em solid rgb(255, 255, 255);border-top: 0.6em solid transparent !important;border-bottom: 0.6em solid transparent !important;box-sizing: border-box;"></section></section><section class="" style="display: inline-block;vertical-align: middle;color: rgb(180, 160, 67);box-sizing: border-box;"><p style="box-sizing: border-box;">双绞线的分类</p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin: 10px 0% 20px;box-sizing: border-box;"><section class="" style="display: inline-block;width: 97%;vertical-align: top;box-shadow: rgb(140, 140, 140) 0px 0px 3px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;vertical-align: top;padding-top: 15px;padding-right: 15px;padding-left: 15px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-right: 0%;margin-left: 0%;box-sizing: border-box;"><section class="" style="text-align: left;line-height: 1.9;font-size: 14px;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;">双绞线其实也有很多不同的类型，根据ISO/IEC 11801标准分类。</p><p style="box-sizing: border-box;">常见的有：<span style="color: rgb(255, 134, 142);box-sizing: border-box;">五类线、超五类线、六类线、七类线、超七类线。</span></p><p style="box-sizing: border-box;">前者线径较细而后者线径较粗。一类线、二类线、三类线、四类线已被标准淘汰，在这里就不多说了哟~</p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;font-size: 14px;line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;">五类线、超五类线、六类线的传输速率在百兆到千兆之间，能够满足我们大部分监控项目的需求，因此广泛应用于各种监控项目中（目前五类线也已逐步被超五类线替代）。</p><p style="box-sizing: border-box;"><span style="letter-spacing: 1.2px;">而超六类及以上的网线，虽然性能更好，但是价格也相对高不少，其性价比不符合监控项目的需求，所以监控类项目中，很少使用这些网线。</span></p><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-right: 0%;margin-bottom: -16px;margin-left: 0%;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;box-shadow: rgb(0, 0, 0) 0px 0px 0px;overflow: hidden !important;box-sizing: border-box;"></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin: 10px 0%;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;vertical-align: top;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;width: 10%;border-width: 1px;border-radius: 0px;border-style: solid;border-color: rgb(62, 62, 62);background-color: rgb(203, 230, 249);padding-top: 4px;padding-bottom: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section><section class="" style="display: inline-block;vertical-align: top;width: 26%;border-style: solid solid solid none;border-width: 1px;border-radius: 0px;border-color: rgb(62, 62, 62);background-color: rgb(255, 205, 209);padding-top: 4px;padding-bottom: 4px;box-shadow: rgb(0, 0, 0) 0px 0px 0px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: left;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: -25px;margin-right: 0%;margin-left: 0%;transform: translate3d(-8px, 0px, 0px);text-align: center;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: top;width: 10%;border-width: 1px;border-radius: 0px;border-style: solid;border-color: rgb(62, 62, 62);background-color: rgb(254, 255, 255);padding: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="font-size: 18px;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">③</strong></p></section></section></section></section><section class="" style="display: inline-block;vertical-align: top;width: 26%;border-style: solid solid solid none;border-width: 1px;border-radius: 0px;border-color: rgb(62, 62, 62);background-color: rgb(254, 255, 255);padding: 4px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">质量鉴别</strong></p></section></section></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;border-width: 1px;border-style: solid;border-color: rgb(249, 110, 87);padding: 10px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="font-size: 14px;line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;">☞真线的外胶皮不易燃烧，而假线的外胶皮大部分是易燃的。<br style="box-sizing: border-box;"></p><p style="box-sizing: border-box;">☞假线在较高温下（40℃以上）外胶皮会变软，真的不会。</p><p style="box-sizing: border-box;">☞真线内部的铜芯用料较纯，比较软、有韧性而且不易被拉断。</p><p style="box-sizing: border-box;">☞网线的扭绕方向是逆时针扭绕而不是顺时针绕的。顺时针绕会对速度和传输距离有影响。</p><p style="box-sizing: border-box;">☞网线里的线在对绕时圈数是不一样的，因为圈数一样的话两对线之间的传输信号会互相干扰，使传输距离变短。</p><p style="box-sizing: border-box;">☞网线标准长度1000英尺/箱（大约相当于305米）。</p><p style="box-sizing: border-box;">☞使用磁铁可以鉴别铁芯线，如果网线用磁铁可以吸引（哪怕是轻微的吸引），那说明是铁芯线，铁芯线因为电阻大，严重影响传输效率和传输距离，不推荐购买。优质的网线一般都是使用铜作为线芯的。</p><p style="box-sizing: border-box;">☞海康超五类网线的芯线导体标称直径是0.500mm（上偏差+0.005、下偏差-0.005）；海康六类网线的是0.565mm（上偏差+0.005、下偏差-0.005）。</p></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: center;line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;"><span style="color: rgb(255, 134, 142);box-sizing: border-box;"><br style="box-sizing: border-box;"></span></strong></p><p style="box-sizing: border-box;"><span style="font-size: 14px;"><strong style="box-sizing: border-box;"><span style="color: rgb(255, 134, 142);box-sizing: border-box;">今天的网线知识小课堂到这里就结束啦！</span></strong></span></p><p style="box-sizing: border-box;"><span style="font-size: 14px;"><strong style="box-sizing: border-box;"><span style="font-size: 14px;color: rgb(255, 134, 142);box-sizing: border-box;">大家了解了吗？想了解海康网线？</span><br style="box-sizing: border-box;"></strong></span></p><p style="box-sizing: border-box;"><span style="font-size: 14px;"><strong style="box-sizing: border-box;"><span style="font-size: 14px;color: rgb(255, 134, 142);box-sizing: border-box;">请看下文哦~</span></strong></span></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin-top: 10px;margin-bottom: 10px;box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;overflow: hidden !important;box-sizing: border-box;"></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin: 40px 0% 10px;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;vertical-align: top;background-color: rgb(246, 246, 246);box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-right: 0%;margin-left: 0%;box-sizing: border-box;"><section class="" style="display: inline-block;vertical-align: middle;width: 45%;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-top: -20px;margin-right: 0%;margin-left: 0%;box-sizing: border-box;"><section class="" style="display: inline-block;width: 100%;vertical-align: top;background-color: rgb(255, 134, 142);box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin: 5px 0%;box-sizing: border-box;"><section class="" style="text-align: center;color: rgb(255, 255, 255);padding-right: 10px;padding-left: 10px;box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="text-align: center;margin-right: 0%;margin-left: 0%;transform: translate3d(15px, 0px, 0px);box-sizing: border-box;"><section class="" style="max-width: 100%;vertical-align: middle;display: inline-block;border-color: rgb(255, 255, 255);border-width: 1px;border-radius: 0px;border-style: solid;overflow: hidden !important;box-sizing: border-box;"></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="margin-right: 0%;margin-left: 0%;line-height: 1;font-size: 14px;box-sizing: border-box;"><section class="" style="width: 0px;display: inline-block;border-top: 0.6em solid rgb(255, 134, 142);border-left: 0.6em solid rgb(255, 134, 142);border-bottom: 0.6em solid transparent !important;border-right: 0.6em solid transparent !important;box-sizing: border-box;"></section></section></section></section><section class="" style="display: inline-block;vertical-align: middle;width: 55%;padding-right: 10px;padding-left: 25px;box-sizing: border-box;"><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: center;line-height: 1.9;letter-spacing: 1.2px;box-sizing: border-box;"><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">海康云商</strong></p><p style="box-sizing: border-box;"><strong style="box-sizing: border-box;">您身边的安防助手</strong></p></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="text-align: center;color: rgb(255, 134, 142);box-sizing: border-box;"><p style="box-sizing: border-box;"><span style="text-decoration: underline;box-sizing: border-box;"><strong style="box-sizing: border-box;">长按扫码下载</strong></span></p></section></section></section></section></section></section></section></section></section><section class="Powered-by-XIUMI V5" style="box-sizing: border-box;" powered-by="xiumi.us"><section class="" style="box-sizing: border-box;"><section class="" style="box-sizing: border-box;"><p style="box-sizing: border-box;"><br style="box-sizing: border-box;"></p></section></section></section></section></section></section></section><p><br></p>
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