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发明名称
Perfectionnements aux amplificateurs à tube à vide
摘要
申请公布号
FR784451(A)
申请公布日期
1935.07.22
申请号
FRD784451
申请日期
1934.09.25
申请人
LE MATERIEL TELEPHONIQUE, SOCIETE ANONYME
发明人
分类号
H03F1/36
主分类号
H03F1/36
代理机构
代理人
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