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发明名称
Wechselsprechanlage mit Abhoersperre
摘要
申请公布号
DE889606(C)
申请公布日期
1953.09.10
申请号
DE1951E004523
申请日期
1951.10.30
申请人
ELECTROACUSTIC GESELLSCHAFT M.B.H.
发明人
OTTEN HANS
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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