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（一）继续向开放式、基于PC的第六代方向发展。基于PC所具有的开放性、低成本、高可靠性、软硬件资源丰富等特点，更多的数控系统厂家会走上这条道路。至少采用PC机作为它的前端机来处理人机界面、编程和联网通信等问题。由原有的系统承担数控的任务。PC机所具有的友好的人机
(A) Continue to develop toward an open, PC-based, sixth generation. Based on the PC has the characteristics of openness, low cost, high reliability, rich hardware and software resources, more CNC system manufacturers will embark on this path. At least PC as its front-end machine to deal with man-machine interface, programming and networking communications and other issues. The original system to undertake the task of numerical control. PC machine has a friendly man-machine