A.大軸上安裝接地炭刷 B.加強(qiáng)大軸絕緣 C.軸承座牢固接地 D.加強(qiáng)軸承座絕緣
A.15S和60S B.15S和45S C.20S和70S D.20S和60S
A.靜止 B.旋轉(zhuǎn) C.交變 D.脈動(dòng)