| 摘要 |
A spark plug provided to ignite fire and generate power for an engine, comprises an outer layer with an inner cavity and a ceramics insulator enclosing a central electrode inside the inner cavity. A gap is located between the ceramics insulator and the housing. The central electrode has a body and a head. One end of the body radically extends and forms a tip. The present invention improves ignition and fuel efficiency, thereby reducing air pollution.
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