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经营范围
发明名称
Perfectionnements aux tubes électroniques
摘要
申请公布号
FR1227584(A)
申请公布日期
1960.08.22
申请号
FR19590795594
申请日期
1959.05.26
申请人
SIEMENS EDISON SWAN LIMITED
发明人
分类号
H01J19/52
主分类号
H01J19/52
代理机构
代理人
主权项
地址
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