- flat twist drill
- 平: flat; level; even; smooth
- 口: mouth
- 麻花钻: fluted or twist drill
- 麻花钻: [机械工程] fluted twist drill; twist-drill; auger-bit; double worm screw; milled twist drill◇麻花钻槽铣刀 cutter for fluting twist drills; twist-drill cutter; 麻花钻活钻头 finger rotary detachable bit; 麻花钻头 twist bit; twist drill bit; twist drill; 麻花钻心 twist web
- 扁麻花钻: flat twist drill
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