Mud pump Classification mud sub-single-effect and two types of double acting, single acting mud pump piston reciprocating in a cycle of action only to complete a suction drain.

泥浆泵分类泥浆泵分单作用及双作用两种型式﹐单作用式泥浆泵在活塞往复活动的一个循环中仅完成一次吸排水行动。

youdao

Atmospheric pressure then pushes the piston back down the cylinder, and if anything (such as a pump) is attached to the piston, some useful work can be done.

于是，气压就会再次将活塞推至汽缸底部。而假如有诸如水泵这样的物体与活塞连接，就可以在活塞的带动下完成一些工作。

youdao

At present, digital variable displacement axial piston pump has some problems.

目前，数字变量轴向柱塞泵还存在着很多问题。

youdao

To prevent this, milk is forced under extreme pressure and at high velocity to pass through tiny passages by a piston pump.

FORBES: Why Milk Isn't As "Natural" As You Think