#disk_brake__disc_brake  hydraulic brake in which friction is applied to both sides of spinning disk by the brake pads
  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_disk__brakedisk  the brake disk plate is fixed to the wheel; pressure is applied to it by the brake pads
  part:  brake_pads  pads apply friction to both sides of the brake disk

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