单词：arc drop
arc drop的用法和样例：
例句
- With an arc quenching chamber having splitters, the breaker makes the arc voltage,which can limit the short circuit current, to a higher value through the near polar voltage drop.它采用多个栅片的灭弧室，利用近极压降将进入到灭弧室中的电弧电压提升到一个较高的值，从而在开断电路的同时还起到对短路电流的限制。
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