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发明名称
Perfectionnements aux lampes électroniques
摘要
申请公布号
FR785266(A)
申请公布日期
1935.08.06
申请号
FRD785266
申请日期
1935.01.26
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J21/02
主分类号
H01J21/02
代理机构
代理人
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