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发明名称
Anordnung zur Verminderung des Grundgeraeusches bei Schallaufzeichnungen
摘要
申请公布号
DE719395(C)
申请公布日期
1942.04.08
申请号
DE1939SC18558D
申请日期
1939.06.06
申请人
DR.-ING. KARL-OTTO SCHMIDT
发明人
SCHMIDT DR.-ING. KARL-OTTO
分类号
H03G11/00
主分类号
H03G11/00
代理机构
代理人
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地址
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