![1955 Mercedes 300SLR with brake flap up. This air brake was necessary, because back then drum brakes were used on the car … | Mercedes benz 300, Mercedes benz, Benz 1955 Mercedes 300SLR with brake flap up. This air brake was necessary, because back then drum brakes were used on the car … | Mercedes benz 300, Mercedes benz, Benz](https://i.pinimg.com/736x/3d/d4/37/3dd437827e52d6e0a798af3ff3decd1c--mercedes-benz--coolest-cars.jpg)
1955 Mercedes 300SLR with brake flap up. This air brake was necessary, because back then drum brakes were used on the car … | Mercedes benz 300, Mercedes benz, Benz
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File:Air brakes, an up-to-date treatise on the Westinghouse air brake as designed for passenger and freight service and for electric cars (1918) (14763592112).jpg - Wikimedia Commons
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