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经营范围
发明名称
Perfectionnements aux tubes récepteurs
摘要
申请公布号
FR942551(A)
申请公布日期
1949.02.11
申请号
FRD942551
申请日期
1947.02.28
申请人
COMPAGNIE DES LAMPES
发明人
分类号
H01J19/42
主分类号
H01J19/42
代理机构
代理人
主权项
地址
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