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发明名称
Improvements in or relating to sparking plugs
摘要
申请公布号
GB483600(A)
申请公布日期
1938.04.22
申请号
GB19370005478
申请日期
1937.02.23
申请人
LEO GRAF
发明人
分类号
H01T13/46
主分类号
H01T13/46
代理机构
代理人
主权项
地址
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