往复泵

由于抽油泵属于单缸单作用往复泵，因此可以将目前较权威的阿道尔夫往复泵泵阀运动微分方程用于研究抽油泵泵阀的运动规律，但阿道尔夫泵阀运动微分方程在泵阀开启初期存在奇点问题。

reciprocating motion

moisture separation in the reciprocating-piston pump

reciprocating filing machine

horizontal opposed reciprocating compressor

reciprocating-piston machine, multi-cylinder pump of reciprocating-piston type

combinations of two or more reciprocating machines or engines

internal-combustion engine, internal-combustion reciprocating-piston

cam mechanism for conveying reciprocating motion