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- DictionarySpark plug/ˈspärk ˌpləɡ/
noun
- 1. a device for firing the explosive mixture in an internal combustion engine.
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- Spark plug
Device that generates sparks in internal combustion engines
A spark plug (sometimes, in British English, a sparking plug, and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine. A spark plug has a metal threaded shell, electrically isolated from a ... Wikipedia
