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。
This model and method can meet the needs of engineering calculation of 3-d fracture design.
该模型和方法能满足三维压裂设计的工程计算需要。
The new model regards the length of curve section as its objective, in which main factors affecting 3 D trajectory design & control are considered quantitatively.
该模型以最短曲线段长度为目标函数，定量地考虑了影响轨道设计与控制的主要因素。
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