Donut-shaped elastic torus and its cross-section.
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Torus - Wikiwand
Geometry-induced rigidity in elastic torus from circular to oblique elliptic cross-section - ScienceDirect
Sweep
Torus - Wikipedia
Article 13: Number – The Monad – Part 3 – The Torus - Cosmic Core
Can one calculate the volume of a torus by pretending it's a cylinder? - Quora
Geometry-induced rigidity in elastic torus from circular to oblique elliptic cross-section - ScienceDirect
Doughnut - Wikipedia
Can one calculate the volume of a torus by pretending it's a cylinder? - Quora
Geometry-induced rigidity in elastic torus from circular to oblique elliptic cross-section - ScienceDirect
Torus! Torus! Torus!