CNC, also known as computer gong, CNCCH or CNC machine tool is actually a name on the other side of Hong Kong, and later introduced into the mainland Pearl River Delta, in fact, it is a CNC milling machine, in Guangzhou, Jiangsu, Zhejiang and Shanghai, some people called "CNC machining center" machining, is a new processing technology, the main work is to compile processing procedures, that is, th