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发明名称
WOHNUNGSSPRECHSTELLE EINER NACH DEM GEGENSPRECHVERFAHREN ARBEITENDEN TUERSPRECHANLAGE.
摘要
申请公布号
DE1873169(U)
申请公布日期
1963.06.06
申请号
DE196300T5673U
申请日期
1963.02.16
申请人
JOSEF TRATNIK
发明人
JOSEF TRATNIK
分类号
主分类号
代理机构
代理人
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地址
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