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Air Pressure
The force exerted by air, whether in a specific container or in the atmosphere, typically measured in pounds per square inch (PSI) or bar.
Warning Devices
Equipment or systems designed to alert or notify individuals of potential hazards or dangers.
Ignition Key
A key used to start a vehicle's engine by activating the ignition system.
FMVSS 121
United States Federal Motor Vehicle Safety Standard addressing air brake systems, aiming to ensure safety and reliability of braking in commercial vehicles.
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