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For the functions f and g, find the requested value.
-Evaluate .
Major Air Leak
A significant escape of air from a pressurized system, such as an air brake system, that can affect system performance.
Tractor-trailer Combination
A vehicle configuration consisting of a towing engine (tractor) attached to one or more trailers for transporting goods over long distances.
Tractor Protection Valve
Air system valve designed to isolate the tractor air supply from the trailer air circuits when tractor system pressure drops to a specified value (usually between 25 and 45 psi).
Governor Cut-out
A mechanism or system that disengages or reduces fuel supply to an engine when reaching a pre-set speed, to prevent overspeeding.
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