在屏幕上画图，截面非常友好。delphi 源码-painting on the screen, the user windows are very friendly to use

4个基于Delphi的材料力学电算程序源代码，这个程序分别是：杆件在拉伸与压缩变形下强度及刚度计算、 　　组合截面几何性质计算、材料力学应力状态分析、压杆稳定分析。源码需要控件。-4 Delphi Mechanics of Materials Computer program source code, the program are: Rod in tension and compression deformation under strength and stiffness calcul