词汇	metal O ring
释义	metal O ring 🌏金属O形环
随便看	round-headed nail roundheadedness round headed rivet round-headeds roundheaded training roundheaded window round headed window round-headed window roundheaded wood screw round header round head grooved bolt round head grooved pin Roundheadism round head knurled rivet Round head low square neck carriage bolts round head machine screw round-head machine screw with grommet nut round head nail round head nailing machine round-head piston round head plane iron roundhead primrose roundhead rivet round head rivet round-head rivet