This paper detailedly discusses the ASP and APS based on STEP (Standard for the ExchangeofProductModelData).
本文建立了基于STEP的面向对象的产品装配模型。
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Therefore, the main idea of this paper is to apply the Standard for the ExchangeofProductModelData (STEP) that has been established by ISO to the PDM system.
The paper establishes the modelofproductdataexchange in computer with feature representations and the object-oriented technique, discusses the method of features and constrains expression.