Microscope Camera ,Digital Microscope Camera,Camera Lucida Microscope,Microscope Eyepiece Camera Ningbo Beilun Kalinu Optoelectronic Technology Co.,Ltd , https://www.kalinueot.com Reaming is often required in mechanical production. The shape of the reamer and other geometric parameters can be selected from the book according to the characteristics of the part. The outer diameter of the reamer is mostly not found in the standard atlas. Calculations must be made. These calculations are complicated and inconvenient to remember. . We have summarized a simple calculation formula.