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经营范围
发明名称
Procédés permettant d'améliorer le rendement des tubes luminescents et fluorescents
摘要
申请公布号
FR985543(A)
申请公布日期
1951.07.19
申请号
FRD985543
申请日期
1949.02.23
申请人
发明人
DEVEAUD FRANCOIS-ANDRE-FERDI
分类号
H01J61/34
主分类号
H01J61/34
代理机构
代理人
主权项
地址
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