刮油环 scraper ring ; [机] oil scraper ring ; oil control rail ; [机] oil scraping ring

活塞刮油环 piston scraper ring

钩形刮油环 hook oil ring

双联刮油环 double oil ring

填料函刮油环 scraping ring for stuffing box

钻孔刮油环 drilled oil ring

斜口刀刮油环 bevel cutter oil ring

活塞刮油环凸缘 flange of pol piston ring

挠曲线活塞刮油环 flexline oil piston ring

双刃刮油环 double hook oil ring