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发明名称
Dispositif de reproduction pour enregistrements sonores en push-pull
摘要
申请公布号
FR848034(A)
申请公布日期
1939.10.20
申请号
FRD848034
申请日期
1938.12.26
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
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