A.每千伏1WM B.每千伏0.5WM C.每千伏0.2WM D.每千伏0.02WM
A.大軸上安裝接地炭刷 B.加強大軸絕緣 C.軸承座牢固接地 D.加強軸承座絕緣
A.15S和60S B.15S和45S C.20S和70S D.20S和60S