锥柄扩孔钻
taper shank core drill
Core drills with Morse taper shanks
直柄扩孔钻
parallel shank core drill
Core drills with parallel shanks
深孔钻
Deep-hole Drilling
gun barrel drill
Deep -hole drilling
deep hole drilling
Deep-hole Drill
Deephole drilling
drilling technology and data accumulation
deep well drilling
single flute drill
锥柄三刃扩孔钻
taper shank three-edge hole-dilating drill
浅孔钻
short hole drill
shallow hole drilling
drill with indexable inserts