A friend needs to convert .STL (stereo-lithography) files into usable CAD formats. IGES, ACIS (SAT), or STEP would all work. She's tried using Pro/E, SDRC, UG, OSD, and SolidWorks. Most can import, ...
If you think about it, STL files are like PDF files. You usually create them using some other program, export them, and then expect them to print. But you rarely do serious editing on a PDF or an STL.
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