Case number 7

Multiple large ellipses out of aluminum wire Multiple large ellipses out of aluminum wire 17 wooden cones with all types of conic sections Horopter curve (cubic ellipse)
Circular cone with all types of conic sections 17 wooden cones with all types of conic sections 17 wooden cones with all types of conic sections 17 wooden cones with all types of conic sections

The corresponding bottom case is: Case number U 7

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