起作用的缸筒活塞密封
affected cylinder piston seal
损坏的离合器活塞密封
damaged clutch piston seal
制动缸活塞密封
brake cylinder piston seal
损坏的空压机缸筒
damaged air compressor cylinder
主缸活塞密封泄漏
master cylinder piston seal leak
离合器活塞密封校准
clutch piston seal alignment
制动器活塞密封泄漏
brake piston seal leakage
液压缸活塞密封
hydrodynamic piston reciprocating seal