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发明名称
Spark plug with marking layer composition
摘要
A spark plug comprising an insulator, on at least a part of a surface of the insulator being formed a marking layer and a glaze layer, wherein the marking layer is exposed on the surface of the insulator and has a composition as described herein.
申请公布号
US7038363(B2)
申请公布日期
2006.05.02
申请号
US20030746379
申请日期
2003.12.29
申请人
NGK SPARK PLUG CO., LTD.
发明人
NUNOME KENJI
分类号
C04B41/87;H01T13/20;H01T13/38
主分类号
C04B41/87
代理机构
代理人
主权项
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