衬管刮塞 liner wiper plug

填塞刮刀 filling knife

柔性填塞刮刀 flexible filling blade ; flexible filling sharp edge ; flexible filling rarizonaor ; flexible filling sword

刮油活塞环 oil scraper piston ring ; wiper piston-ring

活塞刮油环 piston scraper ring

活塞刮削 piston scraping

活塞刮油环凸缘 flange of pol piston ring

挠曲线活塞刮油环 flexline oil piston ring