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红线是火线还是零线_小白理财
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红线是火线还是零线

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红线是火线还是零线 红线是属于火线，要用字母“L”进行标示的。火线在整体电路中是用作运输电流电源线，是带电的，在接线前，务必确保电源是切断的，防触电的危险。另外


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