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发明名称
Stahlband zur elektromagnetischen Tonaufzeichnung.
摘要
申请公布号
AT135236(B)
申请公布日期
1933.11.10
申请号
ATD135236
申请日期
1930.09.24
申请人
TELEGRAPHIE-PATENT-SYNDIKAT G. M. B. H.
发明人
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主分类号
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