T-FLEX CAD - Wikipedia
https://en.wikipedia.org/wiki/T-FLEX_CAD
WEBT-FLEX CAD (T-FLEX) – is a Russian-made parametric computer-aided design (CAD) software application for 2D design, drafting, and 3D solid modeling based on commercial Parasolid geometric kernel. [1] . It's primarily developed and distributed by Russian software company Top Systems based in Russia.
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