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发明名称
Procédé de fabrication d'hélices en tête à queue pour éléments chauffants de cathodes à chauffage indirect
摘要
申请公布号
FR907720(A)
申请公布日期
1946.03.20
申请号
FRD907720
申请日期
1944.11.13
申请人
TELEFUNKEN GESELLSCHAFT FU:R DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J9/10
主分类号
H01J9/10
代理机构
代理人
主权项
地址
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