CAD.FEM is a free 2D/3D CAD design, modelling and finite element analysis program. You can create your model using the available built-in 3D modeler, capable of doing many things such as creating curves, mesh, surfaces, as well as solid. It also supports import and export from various commonly used CAD format such as DWG, DXF, OBJ, STL, STEP, IGES.
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