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经营范围
发明名称
Sound film apparatus with magnetic sound reproduction means
摘要
申请公布号
GB731232(A)
申请公布日期
1955.06.01
申请号
GB19530027161
申请日期
1953.10.02
申请人
MANFRED SEIFFERT
发明人
分类号
G11B15/34
主分类号
G11B15/34
代理机构
代理人
主权项
地址
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