这是书上一段关于三向插头的描述.我有几个问题不懂.1人体接触外壳等于接触火线,就会发生融电事故.如果把外壳用导线接地,即使外壳带了电,也会从接地导线流走、人体接触外壳就没有危险
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![这是书上一段关于三向插头的描述.我有几个问题不懂.1人体接触外壳等于接触火线,就会发生融电事故.如果把外壳用导线接地,即使外壳带了电,也会从接地导线流走、人体接触外壳就没有危险](/uploads/image/z/4998245-5-5.jpg?t=%E8%BF%99%E6%98%AF%E4%B9%A6%E4%B8%8A%E4%B8%80%E6%AE%B5%E5%85%B3%E4%BA%8E%E4%B8%89%E5%90%91%E6%8F%92%E5%A4%B4%E7%9A%84%E6%8F%8F%E8%BF%B0.%E6%88%91%E6%9C%89%E5%87%A0%E4%B8%AA%E9%97%AE%E9%A2%98%E4%B8%8D%E6%87%82.1%E4%BA%BA%E4%BD%93%E6%8E%A5%E8%A7%A6%E5%A4%96%E5%A3%B3%E7%AD%89%E4%BA%8E%E6%8E%A5%E8%A7%A6%E7%81%AB%E7%BA%BF%2C%E5%B0%B1%E4%BC%9A%E5%8F%91%E7%94%9F%E8%9E%8D%E7%94%B5%E4%BA%8B%E6%95%85.%E5%A6%82%E6%9E%9C%E6%8A%8A%E5%A4%96%E5%A3%B3%E7%94%A8%E5%AF%BC%E7%BA%BF%E6%8E%A5%E5%9C%B0%2C%E5%8D%B3%E4%BD%BF%E5%A4%96%E5%A3%B3%E5%B8%A6%E4%BA%86%E7%94%B5%2C%E4%B9%9F%E4%BC%9A%E4%BB%8E%E6%8E%A5%E5%9C%B0%E5%AF%BC%E7%BA%BF%E6%B5%81%E8%B5%B0%E3%80%81%E4%BA%BA%E4%BD%93%E6%8E%A5%E8%A7%A6%E5%A4%96%E5%A3%B3%E5%B0%B1%E6%B2%A1%E6%9C%89%E5%8D%B1%E9%99%A9)
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