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发明名称
Systèmes amplificateurs
摘要
申请公布号
FR929422(A)
申请公布日期
1947.12.26
申请号
FRD929422
申请日期
1946.06.15
申请人
LE MATERIEL TELEPHONIQUE
发明人
VAUVRECY PIERRE
分类号
H03F1/36
主分类号
H03F1/36
代理机构
代理人
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