In recent years, the structure of CAD software is undertaking significant reforms, changing from solid modelling centered systems which are called "geometric CAD" to the feature and constraint based ones , which are called "applied CAD".
近年来，CAD软件结构正在经历着重大变革，正在从以实体造型为中心的“几何CAD”发展到以特征造型和约束造型为中心的“应用CAD”。
参考来源 - 基于细胞元的约束模型及求解的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
One of the applications of the algorithm is worked out for solid modelling.
最后给出该算法在三维立体造型中的应用。
In this paper, a 3-d solid modelling technique in the cutter CAD is introduced.
本文介绍了刀具CAD图形处理中的三维立体造型技术。
Using octree structure to present object in solid modelling systems has many advantages.
利用八叉树表示物体，在实体造型系统中具有许多优点。
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