Hi OSTexo,
No they're segmented lines, that's why I said Michael's AI export is better. I use VectorScribe's excellent plugs to do cleanup in Illustrator.
I'll attach a vector PDF of some primitives you can examine, they show the range from Super Fine to Rough, I haven't used the Filter Options
which include Connect Paths and/or Remove Fine Paths.
In the past I've used Acrobat 9 Extended's 3D Reviewer and ViaCad Pro 7 to output line work and Drop3D is better IMHO.
HTH
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