主要介绍用户应用AutoLISP语言进行AutoCAD的二次开发，编写连接紧固件中的内六角螺钉参数化绘图程序，内六角螺钉是常用的标准件。-This paper introduces a concrete example of user applications for AutoCAD s AutoLISP language secondary development, the preparation of the bolt fastener to connect the parameters o

在进行桥梁后张法预应力施工时，需对钢绞线理论伸长量进行计算，以便在施工中与实际伸长量对比，复核混凝土中钢绞线是否正常拉伸。本工具可在CAD中画好钢绞线形状，选取后输入张拉参数，可在excel中生成结果报表。方便施工计算，特别是有不规则梁体时。-After conducting tensioned prestressed bridge construction, the need for theoretical strand elongation is calculated to compare

上承式拱桥，拱肋构造三维透视图，大跨度钢管混凝土拱桥-The three dimensional perspective drawing of the arch rib and the large span concrete filled steel tube arch bridge

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