A.機(jī)械密封和填料密封 B.強(qiáng)制密封和自緊密封 C.填料密封和自緊密封 D.迷宮密封和填料密封
A.流體潤滑 B.邊界潤滑 C.間隙潤滑 D.混合潤滑
A.±2.5% B.±0.35% C.±1.0% D.1.5%