Earthing design of shallow frozen earth layer in northeast .

东北浅层冻土结构接地设计。

Control of the earthing disconnector in the panels is always done manually .

对面板内接地隔离开关的控制总是手动完成。

Cross-section of the earthing wire and the overall shielding layer .

接地线、总屏蔽层截面。

Cables for portable earthing and short-circuiting .

便携式接地和短路设备用电缆。

Earthing protection of dc traction system for urban rail transit in china is reviewed .

回顾我国城市轨道交通直流牵引系统的接地保护状况。