【机械工程】回转式-活塞机床或抽水机【机械工程】旋转活塞机器或泵

rotary-piston pump

spindle drag pump (spiral pump) rotary-piston pump

intermeshing engagement and intermeshing engagement in rotary-piston machines or engines

multi-stage rotary-piston pump

spring pump rotary-piston pump

combination of rotary-piston pumps with oscillating-piston pumps

rotary vane pump rotary-piston pump

combination with rotary-piston pumps