The benchwork is in with the silk awl slice pare thread is when I am mobile to slice to pare inside the thread particularly,the silk awl damages very easily.

 
  • 讨论了钳工在攻制内螺纹的工作中,尤其是机攻时,常出现的问题,提出了改进措施,着重介绍了丝攻的修磨。
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