使用时，先加载，在cad命令栏输入test，就可以动态的逐个往上或往下增减1，不用一个个改。-When in use, the first load, in the CAD command bar input test, you can go up or down the dynamic one by one or 1, do not have to change one by one.

使用时，先加载，在cad命令栏输入LLL，就可以统计cad里所有线段的长度了-When used, the first load, in the CAD command bar to enter the LLL, you can count all the CAD in the length of the line

使用时，先加载，在cad命令栏输入sss，就可以计算图中的不同区域的总面积了。-When used, the first load, in the CAD command bar to enter the SSS, you can calculate the total area of the different regions in the map.