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数控这一概念是由密歇根洲特拉华城的约翰·帕森于20世纪四十年代后期提出的。
The NC concept was proposed in the late 1940s by John Parsons of Traverse City, Michigan.
youdao
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数控这一概念是由密歇根洲特拉华城的约翰·帕森于20世纪四十年代后期提出的。
The NC concept was proposed in the late 1940s by John Parsons of Traverse City, Michigan.
youdao