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Approximately how long does it take for the rods in your eyes to adapt to the dark?
Service Relay Valve
A Service Relay Valve is a pneumatic device in heavy-duty vehicles' braking systems that responds to signals from the brake pedal to apply or release air pressure to the brakes, ensuring timely and proportional braking action.
Trailer Air Tanks
Pressurized air reservoirs used in the air brake system of a trailer to store compressed air necessary for brake operation.
Service Brake Chambers
Components in air brake systems that convert air pressure into mechanical force to apply the brakes.
Hold-Off Circuit
The air brake circuit used to charge air to the spring brake chambers to compress the park spring. The hold-off circuit must be charged with air before a vehicle with spring brakes can move.
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