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发明名称
Improvements in electric frequency meters
摘要
申请公布号
GB536106(A)
申请公布日期
1941.05.02
申请号
GB19390030526
申请日期
1939.11.21
申请人
MARCONI'S WIRELESS TELEGRAPH LIMITED;HAROLD JEFFERSON;PHILIP ERNEST JELLYMAN
发明人
分类号
G01R23/09
主分类号
G01R23/09
代理机构
代理人
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地址
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