AutoCAD Civil Rating Curve Data Format
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RTC is an extension associated with a CAD / CAM program called AutoCAD Civil 3D. RTC files are used to store data generated by a built-in tool within the program, the curve calculator. Such data concerns the curves used in the created 3D projects. These files are stored in the curve calculator folder.

AutoCAD Civil 3D is an AutoCAD-based design documentation software released for Windows and Apple.

Windows

Updated 09/19/2022

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.bdl CoCreate Designer Bundle Format
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