preliminary pressurization unit

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Aeroponics — is the process of growing plants in an air or mist environment without the use of soil or an aggregate medium. Aeroponic culture differs from both hydroponics and in vitro (Plant tissue culture) growing. Unlike hydroponics, which uses water as a… … Wikipedia
Boeing 247 — Infobox Aircraft name = Boeing 247 type = Passenger airliner manufacturer = Boeing caption = Boeing 247 prototype at Boeing Field, c. 1933 designer = first flight = 8 February 1933 introduced = 22 May 1933 retired = status = primary user = Boeing … Wikipedia
Pilatus PC-12 — PC 12 Pilatus PC 12 Sentinel of the U.S. Bureau of Immigration and Customs Enforcement Role … Wikipedia
aerospace industry — Introduction assemblage of manufacturing concerns that deal with vehicular flight within and beyond the Earth s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the … Universalium
Methane clathrate — Burning ice . Methane, released by heating, burns; water drips. Inset: clathrate structure (University of Göttingen, GZG. Abt. Kristallographie). Source: United States Geological Survey. Methane clathrate, also called methane hydrate,… … Wikipedia

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