单词	延长轨道
释义	延长轨道 advancing the track
随便看	roundheaded borer round-headed borer round headed garlic round-headed leek round-headed leeks round headed nail 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