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介绍了在开发车身覆盖件冲压工艺ＣＡＰＰ系统过程中采用的面向对象的特征建模方法。文中描述了特征模型，特征环的组环算法以及对特征精度信息的表达方法等。
This paper introduces the object-oriented feature modeling method used in the process of CAPP system for stamping of body panels. In this paper, the feature model, the ring algorithm of feature rings and the expression of feature accuracy information are described.