Immediately after machining parts/factors, CNC precision machining grinders are among the last manufacturing operations. Abrasive grinders (or wheels) are used in CNC precision machining grinding to deliver a precisely flat surface which has a easy finish on machined objects. The holes could be for parts assembly or aesthetic reasons. https://josuevlapc.blogdeazar.com/33113932/a-simple-key-for-kovosvit-mas-high-efficiency-machines-unveiled