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发明名称
Perfectionnements aux tubes à décharge électronique
摘要
申请公布号
FR691248(A)
申请公布日期
1930.10.02
申请号
FRD691248
申请日期
1930.03.06
申请人
WESTINGHOUSE ELECTRIC INTERNATIONAL COMPANY
发明人
分类号
H01H37/54;H01J19/34;H01J21/02
主分类号
H01H37/54
代理机构
代理人
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地址
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