single cylinder pump 单杠往复泵 ; 单缸往复泵 ; 单杠来去泵
twin cylinder pump [机] 双缸泵
three cylinder pump [机] 三缸泵
two cylinder pump [机] 双缸泵
Duplex cylinder pump 双缸抽水机
single cylinder pump coupling 单杠往复泵联轴器
multi-cylinder pump multiple piston pump 多缸泵
twin cylinder reciprocating pump 双缸往复泵 ; 双缸来去泵
Now, the drilling pump widespread in use is the tri-cylinder pump.
针对以上要求，目前广泛使用的是三缸单作用往复泵（简称三缸泵）。
QX Series: The QX, our newest pump design, is a compact, fully enclosed dual-cylinder pump system.
QX系列：使我们最新设计的泵产品，紧凑，全封闭的双汽缸泵系统。
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。
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