活塞式混凝土泵
Piston type concrete pump
活塞式混凝土湿喷机
Piston type wet concrete injector
离合器活塞密封校准
clutch piston seal alignment
内部填塞式活塞泵
internal-packed type piston pump
inside-packed type piston pump
损坏的离合器活塞密封
damaged clutch piston seal
中心填塞式活塞泵
center packed type piston pump
转向离合器活塞
directional clutch piston