This thesis illustrates the key techniques and realizing technology on the process of system development and Tree of Assembly, database design, drawing browsing, file transfer, popedom management etc.

本文论述了本系统开发的流程和图档装配树、数据库设计、图纸浏览、文件传输、权限管理等关键技术和实现方法。

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With the rapid development of computer technology, computer Aided Graphics (CAG) is now replacing traditional design, so, it is urgent to choose a suitable drawing software.

随着计算机技术的飞速发展，计算机辅助绘图CAG已逐步取代传统设计，这就需要选择合适的绘图软件。

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And then the math formulae for three dimensional moulding of a special section member with space curves have been derived which could be used for product design and development of drawing software.

据此，推出具有空间曲线的异型截面构件的三维造型数学公式，可供产品设计及绘图软件二次开发使用。

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