CAD二次开发源文件采用的是arx技术，想试哈到底有没用，还有就是这个也太麻烦了-Secondary development of CAD files using the arx source technology, there is useless to try ha in the end, there is too much trouble this

Dont open it, its useless program

CAD大文件清理，找出隐藏的无用数据并进行清理。(CAD large files clean up, find hidden useless data and clean up.)