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I hope you are wrong, but I don't think you are
I usually create chain links by path extrusion (extrude, path). I have also made the links by standard extrusion, then using fillet to round it. They both have the same result, but the path extrusion is much faster and easier.
The elbow was made by path extrusion.
If your objects are solids (as they appear to be) and it is purely for presentational purposes then try the command FLATSHOT.
This will produce what you are after as a 2D block.