counterbore meaning in Chinese
沉孔
埋头孔
埋头直孔
平底扩孔钻
台阶孔
柱坑
锥口孔
钻平孔底
镗（沉头）孔
Examples
- Counterbores with parallel shanks and solid pilots
直柄和实心导向销的平底锪钻 - Detachable pilots for counterbores and countersinks
扩孔钻和沉头钻用可拆卸导杆 - Counterbores with morse taper shanks and detachable pilots
带可换导柱锥柄平底锪钻 - Fasteners - counterbores for hexagon bolts and nuts
六角头螺栓和六角螺母用沉孔 - Counterbores with morse taper shank and detachable pilot
莫氏锥柄和可拆卸导杆沉头钻