《有限元方法编程 第三版》Fortran程序，P58 使用20节点块单元的三维空间问题分析，调试通过。-<Programming the Finite Element Method 3th> program 5.8 three dimensional analysis of an elastic solid using uniform 20-node hexahedral brick elements.

对于学习优先于及有限元编程的学生、研究人员有较大帮助。(It is of great help to students and researchers who have priority in learning and finite element programming.)