螺旋齿

• helical tooth
• skew tooth
• spiral(-curved) tooth
• screwed tooth

参考释义

螺旋齿 [luó xuán chǐ]

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• 短语
  螺旋齿滚刀 {机} diamond knurling tool
  螺旋齿铣刀 helical tooth (milling) cutter