The product attribute and behavior information in virtual assembly is stored in a hierarchy of product, feature, geometry & topology and display levels.

提出了将虚拟装配中的产品属性与行为信息分为产品层、特征层、几何拓扑层以及显示层。

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Usually, object features include gray-scale (density, colour), feature, geometry shape, and so on.

常见的目标特征可分为灰度(密度、颜色)特征、纹理特征和几何形状特征等。

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Usually, object features include gray-scale (density, colour), feature, geometry shape, and so on.

常见的目标特征可分为灰度(密度、颜色)特征、纹理特征和几何形状特征等。

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