发布时间:2025-02-06 02:03:45
电灯的开关应该接在火线与灯泡之间,开掉开关后,熄灭的灯头就不会带电。如果接在零线和开关之间,开掉开关后,熄灭的灯头仍然会带电,会让人以为灯头不带电而触电,不安全。
液压电磁阀型号HD-2D2-G02-LW-E和HD-3C2-G02-LW-E的意义
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