活塞式膨胀机
reciprocating expansion-engine
活塞式喷漆器
piston type paint sprayer
活塞式内燃机
piston type internal combustion engine
piston engine
crankshaft(-type) engine
活塞式空压机
piston type air compressor
piston compressor
piston copressor
活塞式可变截面流量计
piston type variable area flowmeter
活塞式家用水泵
piston type domestic water pump