Autocad二次开发，lisp实现将圆锥展开成平面，在锚穴的机械加工中相当有用-Autocad secondary development, lisp implementation will unfold into a flat cone, can be quite helpful in the anchor hole machining

通过对CAD/CAM文件的识别来建立不同的文件格式。-CAD/CAM software products can help boost productivity for machining medical parts. However, the process of uating and re-calculating CAD model design is basically carried out manually. The demand for automated CAD process