Conversion from FreeCAD to T-FLEX is not supported yet :(

FreeCAD is a customizable, open-source paramentic 3D CAD and BIM software with FEM support, built on the Opencascade geometric kernel. It was created primarily for product design and mechanical engineering, but it can be used in a wide range of industries, such as electrical engineering, or architecture. It runs on Windows, Mac OS, and Linux.

FreeCAD is made to craft real-life objects of different sizes and is perfect for a home user/amateur, programmer, experienced CAD software user, or educator. This software provides tools similar to those of SolidWorks, Catia or Autodesk Revit.

T-FLEX is a Parasolid-based parametric CAD software application for 3D solid modeling and 2D design and drafting, made by Russian software company Top Systems. T-FLEX CAD is developed for Microsoft Windows XP, Vista and is localized into many languages.

T-FLEX CAD is a design solution which was created for mechanical engineering. It provides drafting, modeling and assembly tools that allow engineers to develop various products, from single parts to assemblies.

T-FLEX CAD supports a wide range of operations: drawings, assembly drawings, solids, surfaces, parts, parts with multiple solid bodies, assembly models, sheet metal, bill of materials, etc.

T-FLEX CAD provides parametric, adaptive and associative technology aimed at family-of-parts manufacturers or other design situations that use similar geometry but require many different sizes or permutations. Besides parametric 3D modeling T-FLEX CAD supports parametric 2D drawings creation from scratch. Parametric 2D assemblies can be created as well by inserting parametric 2D components.