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发明名称
MANUFACTURE AND WELDING OF OUTSIDE ELECTRODE OF SPARK PLUG, WITH GOOD HEAT-CONDUCTION METAL WRAPPED THEREIN
摘要
申请公布号
JPH02121289(A)
申请公布日期
1990.05.09
申请号
JP19880274796
申请日期
1988.10.31
申请人
NGK SPARK PLUG CO LTD
发明人
KAGAWA JUNICHI
分类号
B21D53/84;B21K3/00;H01T13/32;H01T21/02
主分类号
B21D53/84
代理机构
代理人
主权项
地址
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