活塞冲击器

piston

moisture separation in the reciprocating-piston pump

differential pump (multistage pump, multi-cellular pump, step piston pump)

rotary-piston pump

oscillating-piston pump

hydrostatic engines of reciprocating-piston type with

reciprocating-piston engine, hydrostatic (reciprocating-piston motor)

piston displacement【机】;piston swept volume【机】;swept volume【机】