| 发明名称 |
Glow plug and spark plug, and manufacturing method therefor |
| 摘要 |
In a glow plug (1) and a spark plug (100), the surface of a main metal shell (3, 101) is coated with a chromate film (42, 142) in which the quantity of trivalent chrome is 95 wt% or more of the contained chrome components and which has a thickness of 0.2 mu m to 0.5 mu m. <IMAGE> |
| 申请公布号 |
EP1032100(A3) |
申请公布日期 |
2001.01.31 |
| 申请号 |
EP20000103729 |
申请日期 |
2000.02.22 |
| 申请人 |
NGK SPARK PLUG CO., LTD |
发明人 |
NASU, HIROAKI;MATSUTANI, WATARU;KUMADA, CHIAKI;NINOMIYA, KATSUNARI |
| 分类号 |
E04C3/36;E04F13/14;E04F19/00;F23Q7/00;H01T13/20;H01T13/39;H01T21/02 |
主分类号 |
E04C3/36 |
| 代理机构 |
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