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经营范围
发明名称
METALLMEMBRAN FUER KOHLEMIKROFONE.
摘要
申请公布号
DE1697133(U)
申请公布日期
1955.04.21
申请号
DE195500ST174U
申请日期
1955.02.16
申请人
STANDARD ELEKTRIZITAETS-GESELLSCHAFT A.G.
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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