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发明名称
Dispositif de raccordement par deux canaux de transmission pour appareils interphones directs
摘要
申请公布号
FR995323(A)
申请公布日期
1951.11.30
申请号
FRD995323
申请日期
1949.09.16
申请人
发明人
DESI CHARLES
分类号
H04M9/08
主分类号
H04M9/08
代理机构
代理人
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