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经营范围
发明名称
Perfectionnement au mode de tension des brins de filament des tubes à vide de grande puissance
摘要
申请公布号
FR924760(A)
申请公布日期
1947.08.14
申请号
FRD924760
申请日期
1946.03.06
申请人
SOCIETE FRANCAISE RADIO-ELECTRIQUE
发明人
分类号
H01J1/18
主分类号
H01J1/18
代理机构
代理人
主权项
地址
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