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发明名称
Dispositif à décharge électronique
摘要
申请公布号
FR867915(A)
申请公布日期
1941.12.05
申请号
FRD867915
申请日期
1940.12.04
申请人
RADIO CORPORATION OF AMERICA
发明人
分类号
H01J21/20
主分类号
H01J21/20
代理机构
代理人
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