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发明名称
WECHSELSPRECHANLAGE FUER SPRECHVERKEHR DURCH LAUTSPRECHER.
摘要
申请公布号
DE1642432(U)
申请公布日期
1952.08.14
申请号
DE195200SC501U
申请日期
1952.05.30
申请人
BRUNO SCHIEFELBEIN
发明人
BRUNO SCHIEFELBEIN
分类号
主分类号
代理机构
代理人
主权项
地址
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