释文：在激发极化法测量中，关闭初始电流后，立刻在时间域接收机上观测到的极化电压称二次电压。
当第二次电压出现在屏幕上时，电压会回复正常水平。
The voltage will return to normal by the second time voltage data is displayed on the screen.
管道与电力线交叉时，由于感应二次电压而使管道防腐层老化。
When intersected with electric line, the coating of the pipeline will be aging due to secondary voltage inducted.
研究了一种新的提高系统电压稳定性的方法——二次电压控制。
This paper studies a new approach, secondary voltage control, to improve voltage stability.
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