Definition: In automotive engineering, a "headgear" is a type of transmission that allows a car to travel over a longer distance when equipped with a lower gear. This means that the engine will have more torque available at higher revs, which can help improve fuel efficiency and power output. The term "headgear" was originally used in the automotive industry to describe the ability of cars to accelerate from a slower initial speed up to a high speed quickly. The concept is based on the idea of reducing friction
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