| 摘要 |
Spark plug with an electrically insulating ceramic insulator (1), a metallic spark plug body (2), a ground electrode (3) and a middle electrode (4) which is located centrally in a hole (5) of the ceramic insulator (1), around the ignition-side end area on the periphery of the middle electrode (4) a peripheral tip (10) being formed which encompasses the middle electrode (4) in an annular manner.
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