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发明名称
Устройство для световой записи звуков
摘要
申请公布号
SU15968(A1)
申请公布日期
1930.06.30
申请号
SU19290049073
申请日期
1929.06.12
申请人
SMIRNOV N.D.
发明人
SMIRNOV N.D.
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主分类号
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