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Message * Articles On Computer-aided Design, including Autocad Dxf, Edif, Acis, .dwg, Gerber File, Gdsii, Intergraph Standard File Formats, Iges, Iso 10303, Collada, Obj, Excellon File, Dgn, Stl (file Format), Standard Parasitic Exchange Format - 1244182729 - 9781244182721