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Cinta de Möebius
[b][color=#b20ea8]Cliqueu el botó de rotació per a girar la cinta de Möebius
Superfície[(1+0.5v cos(u / 2)) cos(u), (1+0.5v cos(u/2)) sin(u), 0.5v sin(u/2), u, 0, 2π, v, -1, 1][/color][/b]