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发明名称
Process for producing photographic sound records of varying intensity
摘要
申请公布号
GB384184(A)
申请公布日期
1932.12.01
申请号
GB19320014048
申请日期
1932.05.17
申请人
I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT
发明人
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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