背板具有引脚，该引脚与接地线电性连接。

The back board is provided with a pin connected electrically with the ground wire.

可控硅房、电动机和其他交流照明设备，都应当装接地线。

SCR units, motors and auxiliary AC light plants should be grounded.

所有的墙壁电插座，手工具和延伸接线等，都应该安设接地线。

All electrical wall outlets, hand tools, extension cords, etc., should quite possibly be provided with proper grounds.

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.

接地线穿过桩子，然后用锤子敲入受保护通信系统附近地面，这些通信系统通常隐藏于军用车辆中。

Grounding wires are threaded through stakes, which are hammered into the ground around a sheltered communications system, usually housed in a military vehicle.