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n. - Conduit that carries a rapid flow of water controlled by a sluicegate; Regulator consisting of a valve or gate that controls the rate of water flow through a sluice.

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Usage examples (32)
  • The distance to the nearest penstock is 6,180 feet, in which length the fall in grade is 28 feet.
  • Aloft in a section of steel water-tunnel liner called a penstock, government officials view the Hoover Dam construction site.
  • The same is true to some extent for losses in the penstock.
  • Here's a look at the penstock that will serve the East Toba turbines.
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