摘要：本文分析了现在几种参数化方法的特点，介绍了一种实用的参数化方法──辅助线方法。详细描述了该方法的数据结构定义及关键技术，并在AutoCAD平台上实现。

摘要：An approach to feature-based parametric design for die and mould is proposed in this *** assembly relationship and parts of the die and mould are described by *** dependent relationship of features is described by parent-child operator *** feature shape and location can be modified by design *** expert system is used for deriving a geometry of the features which satisfies the given *** approach provides a more natural and convenient method of representing a parametric model of the die and mould.