厂家制造的圆饼形游标卡尺研磨器，在使用中有几个缺陷：研磨器用后平面易磨成中间凹形，为保证卡尺测量面的平面度和两测量面的间隙，必须经常修复研磨器的平面，修研量比较大；研磨卡尺时，研磨器平面上的磨料被卡尺测量面推挤出研磨器平面，要常添加磨料，手指上粘满了磨料 Manufacturers to create a round cake vernier caliper grinder, there are several flaws in use: After grinding with a flat surface easily grind into the middle concave, in order to ensure the flatness of the caliper measuring surface and the gap between the two measuring surfaces, the grinder must often be repaired Plane, repair a large amount of research; grinding caliper, the abrasive surface of the caliper is measured by the caliper to push the plane out of the grinder, abrasive often to add, fingers are full of abrasive