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如何正确的用电笔测电线
更新时间: 2021-06-21 03:01:29  

1、对于物理电笔,食指顶住电笔的笔帽端,拇指和中指、无名指轻轻捏住电笔使其保持稳定,然后将金属笔尖插入电线中。查看测电笔中间位置的氖管是否发光。发光的就是带电。

2、如果在白天或者光线很强的地方,测电笔发光不明显,可以用手遮挡光线,谨慎观察。

关键词: 如何 正确 电笔 电线

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