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经营范围
发明名称
Cathodes pour tubes thermioniques
摘要
申请公布号
FR1017164(A)
申请公布日期
1952.12.03
申请号
FRD1017164
申请日期
1950.05.06
申请人
THE M-O VALVE COMPANY LIMITED
发明人
分类号
H01J1/16
主分类号
H01J1/16
代理机构
代理人
主权项
地址
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