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发明名称
Installation téléphonique avec appel à sélection, notamment pour ligne de trains
摘要
申请公布号
FR687776(A)
申请公布日期
1930.08.13
申请号
FRD687776
申请日期
1930.01.07
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04Q5/02
主分类号
H04Q5/02
代理机构
代理人
主权项
地址
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