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发明名称
VERSTAERKER FUER ELEKTROAKUSTISCHE SCHWINGUNGEN.
摘要
申请公布号
DE1681779(U)
申请公布日期
1954.08.19
申请号
DE194900D3642U
申请日期
1949.03.16
申请人
KLANGFILM GESELLSCHAFT M.B.H.
发明人
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主分类号
代理机构
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