As a child, I used to love watching Shirley Temple's movies and I was drawn to reading her autobiography, Child Star. This was one of the best Hollywood autobiographies I have ever read because of the way Shirley gave a complete overview of her life.
Definition of engineer's brake valve. : a valve in the cab of a locomotive for operating the air brake.
A caliper is part of the disc brake system. When you press the brake pedal, the brake fluid flows from the master cylinder to the calipers. Brake fluid then applies pressure on the piston inside the caliper, pushing the brake pads against the rotors to slow/stop your car.