1. To blunt or dull(the edge of a cutting instrument). 
   弄钝，弄卷刃（切割工具的刃）
2. To become dull or blunt by bending back. Used of the edge of a cutting instrument. 
   使变钝因向后弯曲而变钝。用于切割工具的刃
3. an ax with a long handle and a head that has one cutting edge and one blunt side. 
   有长把手、斧头一头是切边一头是钝边的斧子。
4. Anaesthetics blunt the edge of pain. 
   麻醉剂可以减轻疼痛。
5. A sharp cutting edge. 
   刀刃，锋刃锋利的、切割的刀刃

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  块料切割机 blunt cutting edge...钝切削刃 board cutting machine...锯板机 bolt cutting lathe
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• 2. 氧化蓝边
  叶片出汽边 blued edges...氧化蓝边 blunt cutting edge...钝切削刃 blunt edge
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