pneumatics
  氣體力學
  pneu·mat·ics /n(j)ʊˈmætɪks/ 名詞
  氣體力學
  Pneu·mat·ics n.
  1. That branch of science which treats of the mechanical properties of air and other elastic fluids, as of their weight, pressure, elasticity, etc. See Mechanics.
  2. Philos. & Theol. The scientific study or knowledge of spiritual beings and their relations to God, angels, and men.
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  pneumatics
       n : the branch of mechanics that deals with the mechanical
           properties of gases