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发明名称
Improvements in thermionic valve arrangements
摘要
申请公布号
GB676630(A)
申请公布日期
1952.07.30
申请号
GB19490012732
申请日期
1949.05.12
申请人
COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL
发明人
分类号
H01J25/36
主分类号
H01J25/36
代理机构
代理人
主权项
地址
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