Adopted generative rule based on object class, concluded the rule of fixture choosing, author implemented an open easily extendable and maintainable dynamic repository.

• 采用基于对象类的产生式规则，分析了影响工艺装备选择的因素，总结出工艺装备选择的规则，建立了一个开放且易于扩充、维护的动态知识库。