I remember that as early as the end of the 1950s, a year of great technological innovation, I was still a passionate young fitter. One day, I read a "Mechanical Worker" in the reading room of the factory union newspaper, which introduced several methods of grinding the drill bit. It attracted me and carefully copied it on the back of an unissued family letter. . On the second day, several drill bits were ground in this way for the drilling of the product. The effect was very good, the quality of the processed workpieces was all qualified, and the output increased more than three times. At that time, it became a record news. My name and finished production were on the factory.
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