bearing cup counterbore
Counterbore
沉
埋
沉孔
镗孔
扩
柱坑
镗
平底扩孔钻
扩孔钻
扩孔
平实钻
镗阶梯孔
沉头孔
平底扩孔
埋头孔
锥口孔
埋头直孔
钻平底锪钻
锪孔
沉头钻孔
counterbore cutter head
cylinder block counterbore
deep counterbore type gear shaper cutter
housing counterbore seat
machined counterbore surface
pinion bearing cup counterbore
radial adjustable counterbore