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发明名称
Perfectionnements aux relais téléphoniques
摘要
申请公布号
FR793676(A)
申请公布日期
1936.01.29
申请号
FRD793676
申请日期
1935.05.14
申请人
ETABLISSEMENTS LANGLADE ET PICARD
发明人
分类号
H01H50/56
主分类号
H01H50/56
代理机构
代理人
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