A.5% B.10% C.20% D.30%
A.法蘭盤螺栓 B.插入式 C.電弧焊接 D.氣焊焊接
A.會(huì)造成速斷跳閘 B.會(huì)造成過電流跳閘 C.會(huì)造成斷路器跳閘 D.開關(guān)不會(huì)跳閘