On the basis of Feature Modeling and 3d Solid Geometry Modeling, with the idea of Object-Oriented Product Design, a 3d Parametric Feature Modeling Method is applied to develop manifold.

采用特征对象化的设计思想，在特征造型和3维实体几何造型的基础上，研究液压集成块的3维参数化设计方法。

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Using parametric 3D modeling technology realizes automatism modeling of network instruments.

即使用参数化的三维建模技术实现网络设备的自动建模。

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Therefore, it is significant to implement parametric 3d solid modeling and engineering drawing for improving quality of design, shortening period of design, reducing cost and realizing CAM.

因此，实现螺杆的造型设计和工程制图的参数化，对于提高设计质量、缩短设计周期、降低设计成本以及实现CAM，是一项非常有现实意义的工作。

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Therefore, it is significant to implement parametric 3d solid modeling and engineering drawing for improving quality of design, shortening period of design, reducing cost and realizing CAM.

因此，实现螺杆的造型设计和工程制图的参数化，对于提高设计质量、缩短设计周期、降低设计成本以及实现CAM，是一项非常有现实意义的工作。

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