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发明名称
Электромагнитная система для записи и воспроизведения звуков
摘要
申请公布号
SU27104(A1)
申请公布日期
1932.07.31
申请号
SUD27104
申请日期
1930.10.06
申请人
MIKHAJLOV I.I.
发明人
MIKHAJLOV I.I.
分类号
G11B3/46
主分类号
G11B3/46
代理机构
代理人
主权项
地址
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