#drum_brake__drum_brakes  hydraulic brake in which friction is applied to the inside of a spinning drum by the brake shoe
  supertype:  #hydraulic_brake__hydraulicbrake__hydraulic_brakes  brake system in which a brake pedal moves a piston in the master cylinder; brake fluid then applies great force to the brake pads or shoes
  part:  #brake_drum__brakedrum__drum  a hollow cast-iron cylinder attached to the wheel that forms part of the brakes
  part:  #brake_shoe__brakeshoe__shoe  restraint provided when the linings of the brake shoes are moved hydraulically against the brake drum to stop its rotation
     part:  #brake_lining__brakelining  the lining on the brake shoes that comes in contact with the brake drum

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