This appears to be a of Autodesk Inventor Pro 2025.2.1, split into multi-part RAR archives ( part1 , likely part2 , etc.).
The trailing -2021- is unusual because Inventor 2025.2.1 would have been released around 2024–2025, not 2021 — suggesting the -2021- might be a scene release tag or an arbitrary uploader mark. Autodesk.Inventor.Pro.2025.2.1.RUS.ENG.part1.rar -2021-
It looks like you're referencing a specific file: Autodesk.Inventor.Pro.2025.2.1.RUS.ENG.part1.rar -2021- This appears to be a of Autodesk Inventor Pro 2025