a variable radius or chamfer?

 From:  Frenchy Pilou (PILOU)
4607.26 
Does the Viacad 2D/ 3D (100$) can import + export STL format?
(there is no complete lists' formats on the Internet page :(
http://www.punchcad.com/p-9-viacad-2d3d-v8.aspx
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Pilou
Is beautiful that please without concept!
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