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Office swivel chairs, like computer chairs, usually incorporate a gas lift to adjust the height of the seat, but not usually large (e.g. recliner) swiveling armchairs. A draughtsman's chair is a swivel chair without wheels that is usually taller than an 'office chair' for use in front of a drawing board. They also have a foot-ring to support ...
Tower of the Americas: 228.6 m (750 ft) 1968 Concrete San Antonio, Texas: Built as the theme structure for San Antonio's World's Fair, HemisFair '68. It was the tallest observation tower in the United States from 1968 until 1996. 3 Gateway Arch: 192 m (630 ft) 1965 Steel St. Louis, Missouri: Both the width and height of the arch are 630 feet ...
The early "H" metal base (the SAX standard model and the LAX lounge lower model), "X" metal base (the DAX dining model), a lower model with metal rod base (the LAR model), a wooden base (the DSW model), a steel-wire base (the DSR model, also known as the "Eiffel-Tower base"), a cast aluminium base with castors (the PACC model), and a wood ...
The Astronomy Tower of the Sorbonne is a tower at the Sorbonne University's Paris campus built to house an astronomical observatory for its students. The structure was erected during the reconstruction of the Sorbonne, between 1885 and 1901. [1] The tower is 39 meters high, has an upper and lower dome, and includes several rooms.
The Stratospheric Observatory For Infrared Astronomy (SOFIA) was an 80/20 joint project of NASA and the German Aerospace Center (DLR) [1] to construct and maintain an airborne observatory. NASA awarded the contract for the development of the aircraft, operation of the observatory and management of the American part of the project to the ...
The concept of a Tsiolkovsky tower combined with a classic space elevator cable (reaching above the level of GEO) has been suggested. [6] Other ideas use very tall compressive towers to reduce the demands on launch vehicles. [97] The vehicle is "elevated" up the tower, which may extend as high as above the atmosphere, and is launched from the ...
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