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发明名称
Improvements in electrical measuring instruments
摘要
申请公布号
GB673052(A)
申请公布日期
1952.05.28
申请号
GB19500026570
申请日期
1950.10.31
申请人
JAMES G. BIDDLE COMPANY
发明人
分类号
主分类号
代理机构
代理人
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