A.2極 B.3極 C.4極 D.6極
A.1,500r.p.m.(每分鐘轉(zhuǎn)數(shù)) B.1,800r.p.m.(每分鐘轉(zhuǎn)數(shù)) C.3,500r.p.m.(每分鐘轉(zhuǎn)數(shù)) D.3,000r.p.m.(每分鐘轉(zhuǎn)數(shù))