本文从知识获取、表示和推理三个方面进行了论述，重点介绍了FMS调度领域专家知识的面向对象表示。

It is analyzed from three levels of knowledge acquirement, representation and inference, and the object-oriented representation of knowledge in FMS scheduling domain is mainly introduced.

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最后以冲压产品为例，具体说明了特征的面向对象表示方法，同时根据冲压领域的具体情况，提出了由形状特征推导边界条件和外载荷的方法。

Finally, the object oriented method of features is illustrated with the press products used as examples and a new method is put forward that boundary...

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最后以冲压产品为例，具体说明了特征的面向对象表示方法，同时根据冲压领域的具体情况，提出了由形状特征推导边界条件和外载荷的方法。

Finally, the object oriented method of features is illustrated with the press products used as examples and a new method is put forward that boundary conditions...

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