中文说明：本程序用于中心有孔方板规则网格划分，分为三块演示划分后的网格效果。程序运行速度快，是一个优秀的前处理程序。值得下载阅读。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。
English Description：
This procedure is used for the center of the square plate with a hole in the rules of the grid, divided into three to demonstrate the effect of the grid. The program runs fast, is a good pre-processing program. Worth downloading...........................................