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  1.  Operations Guide of Drill Bit Grinding
  2.  Cutting performances and Advantages of Ni Zhifu Ordinary Twist Drill BitCutting performances and Advantages of Ni Zhifu Ordinary Twist Drill Bit
  3. The Standard Sharpening Method of Lathe Tools The Standard Sharpening Method of Lathe Tools
  4. Cutter Sharpening and Re-Grinding of Twist drillThe Standard Sharpening Method of Lathe Tools

 

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