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发明名称
Improved magnetic sound record carrier
摘要
申请公布号
GB635133(A)
申请公布日期
1950.04.05
申请号
GB19470003040
申请日期
1947.01.31
申请人
OTTO KURT KOLB;AXEL CARL GEORG PETERSEN
发明人
分类号
G11B5/74
主分类号
G11B5/74
代理机构
代理人
主权项
地址
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