rotating piston flowmeter 旋转活塞流量计

reciprocating piston flowmeter 簇复活塞式流量计

rotary piston flowmeter 旋转活塞流量计

revolving piston flowmeter 旋转活塞流量计

piston-type flowmeter [仪] 活塞式流量计

piston type flowmeter 活塞式流量表

rotary piston type flowmeter 回转活塞流量计

piston type variable-area flowmeter 活塞式变面积流量计