- concave bit
- 凹面: camber concave; concave surf ...
- 钻头: boring crown; bore bit; dril ...
- 全面钻进钻头: full-hole bit
- 带导向全面钻头: full round nose bit
- 不取心凹面金刚石钻头: concave bit; concave crown
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凹面钻头的英文
发音:
- concave bit
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