Flatcar model 13-401. USSR, 1968 - 1984. Widely used in Russia.
You can use these bogies:
https://www.thingiverse.com/thing:3117985
https://www.thingiverse.com/thing:5986291
This thing was designed for resin printers.
The same railcar for FDM:
https://www.thingiverse.com/thing:3093290
401-YHD-N-Alt.stl | 4.2MB | |
401-YHD-N-Base-Floor-NoSides.stl | 2.2MB | |
401-YHD-N-Base-Floor.stl | 2.0MB | |
401-YHD-N-Base-NoSides.stl | 1.6MB | |
401-YHD-N-Base.stl | 1.4MB | |
401-YHD-N-Main.stl | 1.5MB | |
401-YHD-N-Sides-Alt.stl | 867.7KB | |
401-YHD-N-Sides-Main.stl | 1.0MB | |
SA3-N.stl | 48.0KB |