| A material that provides a path for the flow of electrical current or heat. | |
| Parts equipment manufacturing that is not original equipment from the factory. | |
| A signal that varies the ratio of on-time to off-time, resulting in a square wave that can range between zero and 100; in a process, the ratio of on-time to total cycle time; in fuel injectors, the percentage on-time to total cycle time; in solenoids, the percentage of on-time to total cycle time. | |
| Carbon dioxide |