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手工刃磨钻头,不易使两主刃的偏角相等和两主刃基本对称.为此,我们自制了如图所示的钻头刃校对器,制作方法如下:
Manual sharpening bit, not easy to make the two main edge of the same declination and the two main edges are basically symmetrical.To this end, we made as shown in the drill edge calibrator, made as follows: