In reasoning process of product conceptual design, expression of knowledge of design problem is a pivotal step.
在产品概念设计的推理过程中，设计问题的知识表达是关键的第一步。
UML design pattern of product configuration knowledge expression was provided.
提出了一个用产品配置知识表示的UML设计方案。
On applying symbol modeling principle to product conceptual design, the limit of geometry expression is avoided, and the innovation and abstract requirement of product concept modeling is fulfilled.
将符号建模原理应用于产品概念设计，脱离了几何表达的束缚，满足了概念方案建模的创新性和抽象性要求。
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