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发明名称
Système différentiel électronique
摘要
申请公布号
FR1009763(A)
申请公布日期
1952.06.03
申请号
FRD1009763
申请日期
1948.06.23
申请人
LIGNES TELEGRAPHIQUES ET TELEPHONIQUES
发明人
MAUGARD GUY;BEGUIN CHARLES
分类号
H03F3/32;H04B1/58;H04M1/58
主分类号
H03F3/32
代理机构
代理人
主权项
地址
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