A.750V B.760V C.770V D.780V
A.60℃ B.65℃ C.70℃ D.75℃
A.勵(lì)磁機(jī)軸承 B.同步主發(fā)電機(jī)軸承 C.啟動(dòng)發(fā)電機(jī)軸承 D.通風(fēng)機(jī)軸承