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经营范围
发明名称
Perfectionnements aux dispositifs à décharge électronique
摘要
申请公布号
FR937827(A)
申请公布日期
1948.08.27
申请号
FRD937827
申请日期
1946.12.11
申请人
RADIO CORPORATION OF AMERICA
发明人
分类号
H03B5/18
主分类号
H03B5/18
代理机构
代理人
主权项
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