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发明名称
ANORDNUNG VON DAEMPFUNGSMATERIAL, INSBESONDERE IN FORM VON DAEMPFUNGSRINGEN, BEI ELEKTRODYNAMISCHEN SCHALLWANDLERN.
摘要
申请公布号
DE1742068(U)
申请公布日期
1957.03.28
申请号
DE195700H3742U
申请日期
1957.01.18
申请人
HOLMBERG & CO.
发明人
分类号
主分类号
代理机构
代理人
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