| And automotive terminology, the main part of a heat exchanger, such as a radiator, evaporator or heater. Usually made of tubes, surrounded by cooling fans, used to transfer heat from the coolant to the air. | |
| Alternating current | |
| The part of a clutch assembly that is used to hold the driven disc against the flywheel. The pressure plate is composed of a cover coral springs, driving disc release lever, or a diaphragms boring. | |
| The process through which a liquid is turned into vapor. |