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发明名称
Disposition de couplage dans les installations téléphoniques pour la transmission de signaux
摘要
申请公布号
FR722146(A)
申请公布日期
1932.03.11
申请号
FRD722146
申请日期
1931.08.24
申请人
SIEMENS & HALSKE AKTIEN-GESELLSCHAFT
发明人
分类号
H04Q1/446
主分类号
H04Q1/446
代理机构
代理人
主权项
地址
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