硬质合金焊接式锥柄扩孔钻
carbide welded taper shank core drill
直柄扩孔钻
Core drills with parallel shanks
parallel shank core drill
直锥柄扩孔钻
straight taper shank core drill
锥柄扩孔钻
Core drills with Morse taper shanks
taper shank core drill
锥柄三刃扩孔钻
taper shank three-edge hole-dilating drill
扩孔钻和锥管丝锥复合刀具
combined taper pipe tap and core drill