The carbon block consists of two electrodes spaced so that any voltage above the design level is arced from line to ground.
碳块中有两个彼此间隔的电极，任意高于设计标准的电压都可以跨过电线入地。
The carbon block consists of two electrodes spaced so that any voltage above the design level is arced from line to ground.
碳块中有两个彼此间隔的电极，任意高于设计标准的电压都可以跨过电线入地。
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