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File Extension
STP
Full Name
ISO-10303 STEP Product Data Format
File Extension
OBJ
Full Name
3D Object Format
3D Object Converter
PolyTrans|CAD+DCC
3ds Max (3D Studio Max)
Autoconverter
TransMagic
Afanche 3D Viewer for Mac
FreeCAD
Online CAD converter
Babel3D