近钻头扩孔器  near-bit reamer

翼状扩孔钻头  paddle reaming bit

扩孔器与钻头直径之差  shell clearance

钻孔、钻头、钻床  Drill

导向扩钻钻头  bit life

钻孔扩孔  bore hole drilling and enlarging

金刚石钻头钻孔  diamond drill sample

钻孔钻头  Boring bit

定向钻扩孔  reaming operation in directional drilling

根管扩孔钻  root-canal reamer

骨扩孔钻  osseous reamer; bone reamer

火钻扩孔  Piercing reaming

近钻头扩大器  near-bit reamer

扩孔头  Piercing head

扩孔钻  rdamer; reamer; fraise; expanding drill; counter-bore; expanding auger; Counterbore

扩孔钻和锥管丝锥复合刀具  combined taper pipe tap and core drill

扩孔钻井工具  expanding drilling tool

平底扩孔钻  Counterbore; counterbore drill

三槽扩孔钻  three-groove core drill