【物理】活塞式计量仪器【物理】活塞式计数表

differential piston-type switch

piston-type flowmeter

piston-type accumulator

piston-type variable area flowmeter【仪】

reciprocating pump (piston-type pump)

piston-type cryogenic liquid pump【机】

piston-type flowmeter【仪】

piston-type cylinder【机】