基本解释曲柄行程词组短语短语crank throw type crankshaft 曲拐轴the distance of crank throw 臂距值throw crank 推动曲柄three throw crank shaft 三连曲轴;三拐曲轴single throw crank shaft 单拐曲轴;单拐曲柄轴;单弯曲柄轴专业释义机械工程曲拐