断开接地电缆插头。
电源插头应用具有电气专门知识的人来安装。电源插头必须连接到接地插座上。
An appropriate power plug has to be attached to the machine by electric technicians. Power plug has to be connected to a grounded receptacle.
线圈有三孔插头，其中上为接地线，左右孔接工作导线。
Coil with three-hole plug, which on the ground, then work around hole lead.
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