oil scraper ring [机] 刮油环 ; 刮油圈

piston scraper ring 活塞刮油环

slotted oil scraper ring 开槽刮油环

double-beveled scraper ring 双斜面油环

twin-rail oil scraper ring 双片刮油环

Scraper ring for Stuffing box 填料箱刮油环

oil scraper piston ring 刮油活塞环

Scraper Compression Ring 刮油压缩环

ring-type scraper 环形刮泥器