... above-critical state 超临界状态 above earth potential 对地电位 above grade 在地平面上；高于原定级别 ...
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分别对上述三种情况下的杂散电流的危险性做出了估计。分析了轨道对地电位分布的理论及实测曲线。
The possible hazards arising from stray current under the three conditions mentioned above have been assessed respectively.
电气设备的接地部分与大地零电位点之间存在对地电压。
There is voltage to ground between ground part of electric equipment and point of zero electric potential of earth.
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