短語詞組短語automatically striking the arc 自動引弧striking the arc 引弧striking an arc 繙譯striking of arc 起弧non -contact striking the arc 非接觸式引弧striking voltage of arc 點弧電壓striking current of arc 點弧電流hot striking arc current 熱引弧電流striking of an arc 弧之觸發(fā) 返回 strike arc