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开关和灯泡的接法有哪些_家居日记
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开关和灯泡的接法有哪些

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开关和灯泡的接法有哪些 家用电灯开关单接法是将将零线直接通过灯头穿过去放置在开关的中心点上。然后用其它曲线将电灯开关两边连起来。一个连接在220v的中心点上，另


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