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telephone-line-fault-testing

于 2015-02-02 发布 文件大小:7KB
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  电话线出现断线或短路故障时,线路的阻抗则发生很大变化,利用电桥法测试出电阻的大小,进而得出线路故障的地方(Telephone lines appear disconnection or short circuit fault, the line impedance is changed, test out the size of resistance by Wheatstone bridge method, and then draw the line fault place )

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