Reciprocating plunger seals have been substitute by mechanically or hydraulically actuated diaphragms in diaphragm pumps.
往复活塞密封被机械密封和液力隔膜泵所替代。
The three systems are not hydraulically connected. Where possible they are kept apart to keep to a minimum the effect of engine or tire burst, or other damage.
这三个系统不是液压联通的。它们尽可能隔离，以便当发动机故障、或轮胎爆破、或某些故障时，系统仍然保持最低的功能。
The riveting force is generated hydraulically or pneumatically, depending on the model.
根据型号的不同，铆接力输出分为液压和气压两种。
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