【化】 齿形垫片

grooved pully

grooved friction wheel

grooved rail, composite

glyptolith【地质】;wind-cut stone【地质】;wind-grooved stone【地质】

grooved urethrotomy staff

grooved tape on cinematograph film

grooved and tongued joint【木】;match joint【木】;rebated grooved and tongued joint【木】

grooved drum