A brake shoe that has a leading edge making first contact when applied. Also primary shoe.

Metal spring used on vehicle suspensions. Consists of one or more steel strips clamped together with a mounting eye at each end. The front eye is used for fixing to the chassis and the rear eye for fixing to a swinging shackle. Or it may have a mounting eye at the front and a flat end plate for a slipper shackle at the rear.

A fuel/air mixture with a ratio less than the stoichiometric ratio of 14.7:1. A mixture strength with an excess of air and therefore oxygen.

The way a person takes in, understands, expresses and remembers information; the way a person learns best.

A tough material produced from the skin of animals, by tanning or similar process.

Light emitting diode. An electronic diode that emits light when an electrical current passes through it.

Statutory rights within law.

Laws.

Panel made by a paint technician with different methods of application and amounts of material, resulting in different shades of the same colour.

The flowing out of a paint film, occurring from the time the paint particles form a wet film on the surface to the time the film hardens and dries.