短语词组短语head pulley shaft 主滑轮轴Over Head Cam Shaft 顶置凸轮轴;顶置凸;顶置凸滑轮;顶置Over Head Cmorning Shaft 顶置凸轮轴high -head pressure shaft 高水头压力井道Head shaft angle 头干角suction head shaft 吸头轴head frame of shaft 竖井的顶架 返回 head shaft