geometry layer analysis 几何层分析
The geometry layer provides an interface with CAD system to describe product.
几何层则实现与CAD系统的接口，以提供产品的几何实体描述。
The model is divided into three layers: parts layer, feature layer and geometry layer.
模型分为三个层次：零件层、特征层、几何层。
Human surface control points in geometry layer are fitted with NURBS surface fitting method.
采用NURBS曲面拟合方法对几何层的人体曲面网格数据进行了拟合。
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