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发明名称
Perfectionnements aux cathodes de tubes électroniques
摘要
申请公布号
FR1093817(A)
申请公布日期
1955.05.10
申请号
FRD1093817
申请日期
1954.02.23
申请人
ELECTRIC & MUSICAL INDUSTRIES LIMITED
发明人
分类号
H01J29/48
主分类号
H01J29/48
代理机构
代理人
主权项
地址
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