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1 天前 · The aerospace industry is the assemblage of manufacturing concerns that deal with vehicular flight within and beyond Earth’s atmosphere. The aerospace industry is engaged in the research, development, and manufacture of flight vehicles.
An airplane is any of a class of fixed-wing aircraft that is heavier than air, propelled by a screw propeller or a high-velocity jet, and supported by the dynamic reaction of the air against its wings. Learn more about the different types of airplanes as well as their construction.
2024年6月20日 · Concorde, the first supersonic passenger-carrying commercial airplane (or supersonic transport, SST), built jointly by aircraft manufacturers in Great Britain and France.
2024年6月13日 · Aviation, the development and operation of heavier-than-air aircraft. The term military aviation refers to the development and use of military aircraft, while the term civil aviation refers to all nonmilitary aviation, such as air transportation provided by airlines or the carrying of cargo by.
Japan Airlines flight 123, crash of a Japan Airlines (JAL) passenger jet on August 12, 1985, in southern Gumma prefecture, Japan, northwest of Tokyo, that killed 520 people. The incident is one of the deadliest single-plane crashes in history. Domestic flight JAL 123 departed Tokyo’s Haneda airport.
As the head of the government of the United States, the president is arguably the most powerful government official in the world. The president is elected to a four-year term via an electoral college system. Since the Twenty-second Amendment was adopted in 1951, the American presidency has been.
2024年5月3日 · Qian Xuesen (born December 11, 1911, Shanghai, China—died October 31, 2009, Beijing) was a Chinese engineer and research scientist widely recognized as the “father of Chinese aerospace ” for his role in establishing China ’s ballistic missile program.
