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power brake

an automotive brake set by pressure from some power source, as a compressed-air reservoir, in proportion to a smaller amount of pressure on the brake pedal.
Origin of power brake
1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for power brake
  • The hat-section rings were preformed from flat sheet material in a power brake and then roll formed into rings.
  • The units that provide a power source for cylinder-power brake actuation.

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