本程序用于AutoCAD下任意修改线，特别是用于修改等高线有独到之处内含抽点、改直、改曲、局部修改等命令。非常好用是AUTOCAD制图的好帮手。-the procedures for amending AutoCAD arbitrary lines, in particular for changes contour containing a unique pumping, straight change, change the music, partial changes as ordered. Very handy is a good AutoCAD drawing helper.