The introduction of mathematical software package into the field of math education has brought about many benefits, chief among them the ability to obtain more accurate and sometimes precise results more quickly. In a sense, these programs are design

LibreDWG属于GNU计划中的一个项目，是基于LibDWG开发的。。。说白了它就是专门提供给没钱有想操作DWG文件的人群~