精选优质文档-倾情为你奉上英文原文CNC Machining Process First, our countrys history of the development of numerical control system 1. Our country since 1958, by a group of research institutes, colleges and universities and a few started to CNC Machine Tool Plant of the research and development system. At that time, due to the low level of domestic electronic components, such as the department of economic constraints, lack of a larger development. 2. In the reform and opening up, Chinas numerical con
