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Szilassi polyhedron
By tca
The Szilassi polyhedron is a nonconvex polyhedron, topologically a torus, with seven hexagonal faces and is a wonderful object to 3dprint.
There's a small version and a BIG cheesy one.
Enjoy, print, share and learn!
https://en.wikipedia.org/wiki/Szilassi_polyhedron
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