- chopping bit
- 冲击: lash; pound
- 钻: drill; auger
- 钻头: boring crown; bore bit; dril ...
- 震击钻钻头: hammer operated bit
- 冲击钻头: cable bit; chisel bit; chopping bit; drill hammer; impact bit; impact drill bit; percussion bit; percussive bit; punch boring; trepan chisel; two-point bit
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