three throw crank

... three lobe ~ 三叶凸轮泵； three throw crank ~ 三缸曲柄泵； three throw reciprocating ~ 三缸往复泵； ...

希高翻译... ... three throw crank shaft 三拐曲轴 three throw crank 三拐曲柄 three voltmeter method 三伏特计法 ...