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经营范围
发明名称
Akustisches Signalinstrument
摘要
申请公布号
DE492932(C)
申请公布日期
1930.02.27
申请号
DENDATW082693D
申请日期
申请人
WESTFAELISCHE METALL-INDUSTRIE A. G.
发明人
分类号
G10K9/20
主分类号
G10K9/20
代理机构
代理人
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