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发明名称
Selbstanschluss-Fernsprechanlage, bei der alle Verbindungen ueber Relais hergestellt werden
摘要
申请公布号
DE595714(C)
申请公布日期
1934.04.21
申请号
DE1928T034967D
申请日期
1928.04.12
申请人
TCHOUBRITCH, DERVAL & CIE
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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地址
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