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本文阐述了特征基本概念及分类，并且以回转类零件为实例介绍了一种在ＡｕｔｏＣＡＤ平台上开发的基于特征的ＣＡＤ 系统的方法。
In this paper, the basic concepts and classification of features are expounded, and a method of feature-based CAD system developed on AutoCAD platform is introduced by taking rotating parts as an example.