![]() Acetylene regulator: A device used to control the fl ow of acetylene. Acetylene generator: A device that brings the proper amounts of water and calcium carbide together at the rate required to safely generate acetylene. Used to store and ship acetylene (sometimes called “tank” or “bottle”). Acetylene cylinder: Specially built container manufac- tured according to ICC standards. When acetylene is burned in an atmosphere of oxygen, it produces one of the highest fl ame temperatures obtainable. Acetylene (C2H2): Gas composed of two parts of carbon and two parts of hydrogen. ![]() Accident: An unintentional and unexpected undesirable event. Accelerating voltage: A voltage difference between an emitter and anode. ![]() Absolute zero: The temperature (–273☌, or 0K) at which all molecular motion stops. Abrasive wear: Deterioration of metal due to a rubbing or scraping action. It is available from the American Welding Society. For additional defi nitions, refer to the publication Standard Welding Terms and Defi nitions (ANSI/AWS A3.0). Technical engineering terms have been simplifi ed. This Glossary of Terms explains the meaning of terms most used by welders.
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