The steel structure design CAD is a complicated and huge system project dealing with Mathematics, Engineering Mechanics, Architecture and Computer Graphics.
钢结构设计CAD是一项复杂、大型的系统工程，涉及到数学、工程力学、建筑学、计算机图形学等多种学科。
This paper discusses the necessity of applying Database System to Bridge CAD. The constitution and system architecture of bridge CAD based on core database system has been studied.
指出了在桥梁CAD中采用数据库技术的必要性，叙述了以核心数据库系统为支撑的桥梁CAD系统的组成和体系结构。
According to the general approach on metro route profile design, it is founded that the architecture of the CAD software system of metro route profile which guide the MRPCAD system development.
根据地铁线路纵断面设计的一般步骤，建立了纵断面辅助设计软件的系统结构，指导MRPCAD的开发研制。
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