基本解释刮油圈；[机] 刮油环词组短语短语oil l scraper ring 刮油圈oil scraper piston ring 刮油活塞环slotted oil scraper ring 开槽刮油环grooved drum oil scraper ring 开槽油环twin -rail oil scraper ring 双片刮油环专业释义机械工程括油环刮油圈刮油环油环