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先从CAD定义的产生着手,接着就CAD软件现状、主要分类,及各自的主要特色做了四方面的表述,最后阐述了机械CAD发展的趋势。
First of all, this paper starts with the definition of CAD, and then makes a four-pronged presentation on the status quo of CAD software, the main categories and their respective main features. Finally, the development trend of mechanical CAD is expounded.