The design of the structure of Caseegrain drawtube in space remote instrument was introduced. The product model was constructed using 3-d CAD technique.
介绍了空间遥感仪器中卡塞格伦镜筒的结构设计，利用三维CAD技术构建了产品模型。
In this paper, we first focus on the CAD-based object model construction and then introduce a rule-based method to precompile this geometrical model into a match tree for 3-d object orientation.
集中阐述了基于CAD的物体模型建立过程，并介绍了一种基于规则的将物体几何模型予编译为匹配树的三维物体定位方法。
The supplement surface was optimized by 3-D CAD software, and the finite element model for drawing simulation of the crossbeam was established.
应用三维CAD软件对工艺补充部分进行了优化设计，并建立了横梁拉延成形模拟的有限元模型。
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