| A component located on the brake backing plate, on which the brake shoes rotate and to which the return springs are secured. | |
| In a transmission, where all gears are constantly in contact and turning with one another. | |
| A material whose atoms become oxidized Electrically charged in solution. In automobiles, the battery electrolyte is a mixture of sulfuric acid and water. | |
| A device that converts heat energy into mechanical energy. |