实现了参数化的三维造型设计以及高精度的流动数值模拟，为气道的设计与改进提供了高效实用的研究手段。
D parametric modeling design and precise numerical flow simulation are realized and the effective and practical research tools for design and improvement of the ports are provided.
本文提出了三维参数化特征造型的一种新的思路和方法。
A new methodology on three-dimensional parametric feature-based modeling is presented.
该方法也适用于其它机械零件三维实体参数化造型软件的开发。
This method is also suitable for the development of 3d entity parameterized modeling software of other mechanical parts.
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