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power brake

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Labeled diagram of a vacuum-activated power brake system in a car, showing the brake pedal, master cylinder, brake booster chamber, pistons, valves, and airflow, with arrows and text explaining how pressing the pedal uses vacuum and atmospheric pressure to assist braking.

power brake: Media

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Labeled diagram of a vacuum-activated power brake system in a car, showing the brake pedal, master cylinder, brake booster chamber, pistons, valves, and airflow, with arrows and text explaining how pressing the pedal uses vacuum and atmospheric pressure to assist braking.

vacuum-assisted power brake

Vacuum-assisted power brake for an automobile. A constant vacuum is maintained in...

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