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发明名称
ELEKTRISCHE SIGNALEINRICHTUNG ZUR HERBEIRUFUNG DES BEDIENUNGSPERSONALS IN GASTSTAETTEN.
摘要
申请公布号
DE1693489(U)
申请公布日期
1955.02.17
申请号
DE195400J3345U
申请日期
1954.03.27
申请人
ELFRIEDE JAEGER
发明人
ELFRIEDE JAEGER
分类号
主分类号
代理机构
代理人
主权项
地址
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