If the cable has only two contacts, double-check that it's not frayed or loosened in any way.

对只有两芯的电缆，务必采用各种办法反复检查电缆是否磨损或者松脱。

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If the cable has only two contacts, double-check that it's not frayed or loosened in any way.

对只有两芯的电缆，务必采用各种办法反复检查电缆是否磨损或者松脱。

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