The key to the operation of the polishing machine is to try to obtain a polishing rate in order to remove the damage layer generated during polishing as quickly as possible. At the same time, the polishing damage layer will not affect the finally observed tissue, that is, it will not cause false tissue. The former requires the use of coarser abrasives to ensure a higher polishing rate to remove the polished damage layer, but the polishing damage layer is also deeper; the latter requires the use of fine materials to make the polishing damage layer shallower, but the polishing rate low. The flat polishing machine produced by our company is also very good.