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发明名称
Kellnerrufvorrichtung
摘要
申请公布号
DE838415(C)
申请公布日期
1952.05.08
申请号
DE1948P006848D
申请日期
1948.10.02
申请人
GERTRUD BOTH
发明人
NOACK ANTON
分类号
G08B5/02
主分类号
G08B5/02
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