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经营范围
发明名称
Fil pour noyau de cathodes à chauffage direct
摘要
申请公布号
FR927782(A)
申请公布日期
1947.11.10
申请号
FRD927782
申请日期
1946.06.11
申请人
THE M.-O. VALVE COMPANY LIMITED
发明人
分类号
H01J1/15
主分类号
H01J1/15
代理机构
代理人
主权项
地址
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