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开关接零线还是火线_家居日记
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开关接零线还是火线

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开关接零线还是火线 根据安全用电的相关规定，开关应与火线相连，由于开关直接连接着电器设备，与火线相连后，可以起到控制的作用，当开关关闭以后，呈断电状态，此时没有


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