- 钻头: boring crown; bore bit; dril ...
- 钢: sharpen; strop; whet
- 钻钢 钻头钢: drillsteel
- 钻头: boring crown; bore bit; drilling bit; [机械工程] bit (of a drill) 三牙轮钻头 three cone bit; 卸下钻头 break out a bit; 装上钻头 brace a bit
- 沉头钢钉: round plain head nails
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