This thesis researches on the theory and application of the new CAD model having kinematics and dynamics feature, which also indicates its great development potential and widely application future.
本文通过对包含运动学和动力学特征的新型CAD模型理论与应用的研究，预示了该理论和方法有很大的发展潜力和广阔的应用前景。
The DXF file format is one of the widely used graphics exchange formats in the graphics application development, and the lots of CAD software have supported it.
DXF文件格式是图形开发中最常用的图形交换格式之一，众多CAD软件都支持它。
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