21. The roof of the Philips pavilion was created by complex hyperbolic paraboloid surfaces stretched between cables. 22. When one remove a section of the paraboloid , rays coming from that section are lost. 23. Immiscible liquids rotating around a vertical axis is an upward-opening circular paraboloid . ]] 24. Separate transmitting and receiving dipoles were at the focus of a 3-meter paraboloid reflector. 25. These other paraboloids only seem like obstacles due to the self-intersecting nature of the immersion. 26. It now finds itself on the northern lobe, hidden underneath the third paraboloid of Figure 3. 27. The hyperbolic paraboloid is a doubly ruled surface : it contains two families of mutually skew lines. 28. The top surface of a fluid in an open-topped rotating container will form a paraboloid . 29. Thus, Flamm's paraboloid is useful for visualizing the spatial curvature of the Schwarzschild metric. 30. The feed is then rotated around the focal point of the paraboloid to produce the conical rotation.
