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Can I import models from Autodesk products to Blender?
https://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Import-Export/DXF_Importer
Blender also supports importing and exporting of FBX format.
http://blender.stackexchange.com/questions/6690/how-to-import-an-fbx-file-into-blender
http://metlab.cse.msu.edu/exporting.html
very nice post...very useful tooo