Aerospace industry of China

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•  Autonomous areas of China

  In a similar fashion to the former Soviet Union's titular nations, a number of areas associated with one or more ethnic minorities are designated as autonomous within the People's Republic of China (PRC). These areas are recognized in the PRC's constitution and are nominally given a number of rights not accorded to other administrative divisions. The actual degree of autonomy of such regions is questioned.

  

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•  Perm (hairstyle)

  A permanent wave, commonly called a perm, is the chemical and/or thermal treatment of hair to produce waves, curls or straight hair. The use of the word 'permanent' is justified insofar as when the wave is permed, it remains so; however, as the hair grows, the new hair that grows has not been waved, while cutting the hair from the end removes that which is waved, giving the impression that the permanent wave gradually disappears. In cosmetology, it is termed a type of curl reformation.

  

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•  Paraboloidal coordinates

  Paraboloidal coordinates are a three-dimensional orthogonal coordinate system that generalizes the two-dimensional parabolic coordinate system. Similar to the related ellipsoidal coordinates, the paraboloidal coordinate system has orthogonal quadratic coordinate surfaces that are not produced by rotating or projecting any two-dimensional orthogonal coordinate system.

  

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•  Ivan Alexandrovich Vishnegradsky

  Ivan Alexandrovich Wyschnegradsky (2 May, julian calendar/14 May 1893-29 September 1979), also transliterated as Vïshnegradsky, Wyshnegradsky, Wischnegradsky, Vishnegradsky, or Wishnegradsky (since he emigrated to France, he used "Wyschnegradsky" as spelling for his surname) was a Russian composer primarily known for his microtonal compositions, including the quarter tone scale, though he used scales of up to 72 divisions (mainly third, sixth and twelfth of tone).

  

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•  Explod-O-Pop

  CBS's Late Show with David Letterman regularly features different sketches that follow the monologue and precede interviews with guests. Often these are repeated absurdist segments, involving various cast members, Dave's friends, audience participation, edited or contrived news or promotional videos, or competitions or stunts staged outside the Ed Sullivan Theater. Currently, the show's regularly scheduled segments consist of "Small Town News" on Mondays and "Fun Facts" on Fridays.

  

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