flashover distance
... flashover at brush 刷弧，电刷跳火 flashover distance 闪络距离 flash-over ground relay 闪络接地继电器 ...
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不同型式染污绝缘子沿爬电距离的闪络电压梯度；
The voltage gradient of five types of polluted insulators according to the leakage distance.
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