Name: natural diamond milling experiment
1. when the wheel is mounted, it runs very large. The bottom can be trimmed and the worn parts will not burn
2. grinding, grinding wheel produced eccentric, concave convex surface, it is necessary to use diamond knife trimming, so that it is smooth. When grinding wheel is unfavorable, it needs to be repaired so as to restore the grinding performance.
3. can be used to fix the circle R for more than R1