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发明名称
Improvements in or relating to thermionic valves
摘要
申请公布号
GB382603(A)
申请公布日期
1932.10.27
申请号
GB19320022226
申请日期
1932.08.08
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J1/20
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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