【机械工程】活塞式蓄压器【机械】活塞式蓄压器

differential piston-type switch

piston-type flowmeter

piston-type meter

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】