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发明名称
Устройство для оптической записи звука с зеркальным гальванометром
摘要
申请公布号
SU66788(A1)
申请公布日期
1945.11.30
申请号
SU19440334906
申请日期
1944.09.23
申请人
PARFENTEV A.I.
发明人
PARFENTEV A.I.
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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