rotary-piston pump
【机械工程】转子发动机、振动活塞发动机【机械工程】螺旋活塞机或引擎，振荡活塞机或引擎
rotary-piston machine or engine, oscillating-piston machine or engine
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相关词条
spindle drag pump (spiral pump) rotary-piston pump
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combination of rotary-piston pumps with oscillating-piston pumps
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combination with rotary-piston pumps