Conversion from 3DM to PSM is not supported yet :(
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3DM
A 3DM file is a native file format for 3D models in Rhinoceros CAD application software. It contains surface, point and curve information.
3DM files can be exported in both NURBS (non-uniform rational B-spline) and polygon mesh representations, making it possible for other CAD / CAM / CAE / graphic design software to edit those models.
In addition to Rhino CAD software, 3DM files can be opened with Autodesk Fusion 360.
PSM
File created by Solid Edge, a CAD program popular among product designers; contains design, which may include one or more parts; used to store design data for simulating manufacturing processes.
Solid Edge file extensions are .asm, .par, .psm.
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