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发明名称
Dispositifs d'essai pour transmissions téléphoniques
摘要
申请公布号
FR827670(A)
申请公布日期
1938.05.02
申请号
FRD827670
申请日期
1937.10.08
申请人
LE MATERIEL TELEPHONIQUE, SOCIETE ANONYME
发明人
分类号
G01R17/00;H04B3/46
主分类号
G01R17/00
代理机构
代理人
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