The model of gear profile curve and gear transition curve are the difficult but key point of gear 3d solid model.
齿廓曲线尤其是齿根过渡曲线的构建是渐开线圆柱齿轮三维实体建模的难点，也是其关键问题。
By using 3d solid model, the twist-back Angle of steam turbine twisted long blade with integral shroud was analyzed and calculated.
采用三维实体模型，对自带围带的汽轮机扭曲长叶片的扭转恢复角进行了计算分析。
Objective Depending on rapid prototyping technique, an individual titanium frame based on 3d solid model was using to reconstruct the jaw.
目的在运用快速成型技术制作的颌骨模型上作成个体化钛支架，以构筑颌骨三维形态。
As it is hard to recognize intersecting features automatically, a new method to recognize such intersecting features in 3d solid model was proposed.
针对相交特征自动识别较为困难的问题，提出一种新的三维实体模型相交特征识别方法。
The fourth chapter tells how to build 3D solid model for hull structure applying the oriented object technology, furthermore, the corresponding data structures are presented.
第四章介绍如何利用面向对象的方法建立船舶结构的三维实体模型，同时给出相关的数据结构；
To establish CT 3D model and 3D anatomical model of lumbar spine and elucidate their solid shape, 3D space position and adjacent relationship.
建立脊柱腰段的CT三维重建、三维解剖模型，阐明脊柱腰段及其周围主要结构的立体形态、三维空间位置及其毗邻关系。
Features 3d geometric modeling technology is the area of solid model relay technology is another important milestone.
特征技术是三维几何建模领域中继实体模型技术后的又一个重要里程碑。
First, build 3d solid assembly model of the inspection robot in UG and obtain the key parameters of mass, inertia and CM (center of mass).
首先，应用ug建立了巡线机器人的三维实体装配模型并获得各关键零部件的质量、惯量、质心点位置等参数。
All obtained valid 3d solid elements are combined with Boolean operation, and the volumetric model of a tooth is then achieved at last.
把全部有效实体单元进行3维实体布尔运算，得到牙齿的实体模型。
Let the discrete element method (DEM) be developed into the numerical simulation of 3d fluid-solid two-phased flows, the trajectory flexible model of particle group has been put forward.
将离散单元法(DEM)拓展到三维流固两相流的数值模拟中，提出了颗粒群轨道柔性模型。
Variation solid design for 3d model and 3d assemble design has presented obvious advantage.
三维造型变量实体设计和三维装配设计已显现出明显的优势。
Variation solid design for 3d model and 3d assemble design has presented obvious advantage.
三维造型变量实体设计和三维装配设计已显现出明显的优势。
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