three throw crank pump 三缸曲柄泵 ; 三拐曲柄泵 ; 三缸曲轴弯曲部分泵

three throw crank shaft 三连曲轴 ; 三拐曲轴

three throw crank-shaft 三连曲柄轴

three throw crank 三拐曲柄

three throw crank pump coupling 三缸曲柄泵连轴器

three-throw crank shaft 三连曲柄

three-throw crank pump 三拐曲柄泵

three throw crank pu 三缸曲柄泵