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  2. Umbrella - Wikipedia

    en.wikipedia.org/wiki/Umbrella

    An umbrella or parasol is a folding canopy supported by wooden or metal ribs that is mounted on a wooden, metal, or plastic pole. It is usually designed to protect a person against rain . The term umbrella is traditionally used when protecting oneself from rain, while parasol is used when protecting oneself from sunlight, though the terms ...

  3. T-11 parachute - Wikipedia

    en.wikipedia.org/wiki/T-11_parachute

    The main canopy is a modified version of a cross/cruciform platform. The canopy has an increased inflated diameter of 14 percent and a 28 percent increase in surface area, when compared with the T-10D assembly. The T-11 main canopy utilizes a unique deployment sequence to reduce the opening shock and canopy oscillation. The T-11 is designed to ...

  4. Vault (architecture) - Wikipedia

    en.wikipedia.org/wiki/Vault_(architecture)

    Gothic rib vault ceiling of the Saint-Séverin church in Paris Interior elevation view of a Gothic cathedral, with rib-vaulted roof highlighted. In architecture, a vault (French voûte, from Italian volta) is a self-supporting arched form, usually of stone or brick, serving to cover a space with a ceiling or roof.

  5. Tensile structure - Wikipedia

    en.wikipedia.org/wiki/Tensile_structure

    The world's first tensile steel shell by Vladimir Shukhov (during construction), Nizhny Novgorod, 1895 The Sidney Myer Music Bowl in Kings Domain, Melbourne. In structural engineering, a tensile structure is a construction of elements carrying only tension and no compression or bending.

  6. Junkers Ju 87 - Wikipedia

    en.wikipedia.org/wiki/Junkers_Ju_87

    The Junkers Ju 87, popularly known as the "Stuka", [b] is a German dive bomber and ground-attack aircraft.Designed by Hermann Pohlmann, it first flew in 1935.The Ju 87 made its combat debut in 1937 with the Luftwaffe's Condor Legion during the Spanish Civil War of 1936–1939 and served the Axis in World War II from beginning to end (1939–1945).

  7. Vachellia tortilis - Wikipedia

    en.wikipedia.org/wiki/Vachellia_tortilis

    Vachellia tortilis, widely known as Acacia tortilis but now attributed to the genus Vachellia, [4] is the umbrella thorn acacia, also known as umbrella thorn and Israeli babool, [5] a medium to large canopied tree native to most of Africa, primarily to the savanna and Sahel of Africa (especially the Somali peninsula and Sudan), but also occurring in the Middle East.

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