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两根220v的线漏电了怎么测220v二相电漏电怎么查
删除 一、漏电是用电器外壳和市电火线间由于某种原因连通后和地之间有一定的电位差产生的。检测漏电的最好方法就是用电笔接触带电体，如果氖泡亮一下立刻…
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