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发明名称
Perfectionnements aux lampes à décharge électronique et, en particulier, aux magnétrons ou aux lampes à champ de freinage
摘要
申请公布号
FR820065(A)
申请公布日期
1937.11.02
申请号
FRD820065
申请日期
1937.04.01
申请人
TELEFUNKEN GESELLSCHAFT FU:R DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J21/18;H01J25/50;H01J25/76;H01J43/02
主分类号
H01J21/18
代理机构
代理人
主权项
地址
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