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发明名称
Perfectionnements aux pieds pour dispositifs à décharge électronique
摘要
申请公布号
FR817880(A)
申请公布日期
1937.09.13
申请号
FRD817880
申请日期
1937.02.16
申请人
RADIO CORPORATION OF AMERICA
发明人
分类号
H01J5/32
主分类号
H01J5/32
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代理人
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