A system in which sets of numerical control machines are connected to a computer, allowing direct control of machines by the computer without use of external storage media.
直接数控-是由一系列数控机械连接到同一个计算机上而形成的控制系统。该系统用计算机而不需要外界的存储媒体直接控制机械。
This guy is lazy,Introduction has not been set
