往复式正排量泵可能使用带有固定密封的活塞；带有动密封的活塞；或隔膜来运行水泵。
Reciprocating Positive Displacement pumps may use plungers with static seals pistons with dynamic seals or liquid diaphragms to achieve their pumping action.
往复式正排量泵可能使用带有固定密封的活塞；带有动密封的活塞；或隔膜来运行水泵。
Reciprocating Positive Displacement pumps may use plungers with static seals pistons with dynamic seals or liquid diaphragms to achieve their pumping action.
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