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Flash wheel

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Flash \Flash\, n. [OE. flasche, flaske; cf. OF. flache, F.
   flaque.]
   1. A pool. [Prov. Eng.] --Haliwell.

   2. (Engineering) A reservoir and sluiceway beside a navigable
      stream, just above a shoal, so that the stream may pour in
      water as boats pass, and thus bear them over the shoal.

   {Flash wheel} (Mech.), a paddle wheel made to revolve in a
      breast or curved water way, by which water is lifted from
      the lower to the higher level.
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