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.
可使用在循环水泵、多级泵、污水泵、往复式泵等有鼠动或跳动的设备上。
Multipolar pump. Polluted water pump. Move back and forth pump and jumping equipment.
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