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发明名称
Perfectionnements aux tubes à décharge électronique et applications
摘要
申请公布号
FR675619(A)
申请公布日期
1930.02.12
申请号
FRD675619
申请日期
1929.05.23
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J21/16
主分类号
H01J21/16
代理机构
代理人
主权项
地址
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