短語(yǔ)詞組短語(yǔ)oil l scraper ring 刮油圈oil scraper piston ring 刮油活塞環(huán)slotted oil scraper ring 開(kāi)槽刮油環(huán)grooved drum oil scraper ring 開(kāi)槽油環(huán)twin -rail oil scraper ring 雙片刮油環(huán) 返回 oil scraper ring