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发明名称
An improvement in producing sound and picture records
摘要
申请公布号
GB377145(A)
申请公布日期
1932.07.21
申请号
GB19320009543
申请日期
1932.04.02
申请人
I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT
发明人
分类号
G03C5/14
主分类号
G03C5/14
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代理人
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