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发明名称
Improvements in tachometer
摘要
申请公布号
GB315395(A)
申请公布日期
1930.07.24
申请号
GB19290016850
申请日期
1929.05.31
申请人
AC SPARK PLUG COMPANY
发明人
分类号
G01P3/495
主分类号
G01P3/495
代理机构
代理人
主权项
地址
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