A.電子不轉(zhuǎn) B.葉片磨損 C.溢流閥調(diào)節(jié)過緊 D.彈簧斷裂
A.10KV/400V B.10KV/380V C.10KV/220V D.10KV/0.4KV
A.ib B.ai C.d D.bi