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介绍了在机械ＣＡＤ系统中采用面向对象的设计思想开发部件设计系统的一种新思路，并以大型热工机械——锅炉设计子系统的成功实现为例，介绍了该方法实现的关键技术。
This paper introduces a new idea of developing component design system based on object - oriented design idea in mechanical CAD system. Taking the successful realization of large thermal industrial machinery - boiler design subsystem as an example, the key technologies of this method are introduced.