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发明名称
Manufacture of magnetic records
摘要
申请公布号
US3170044(A)
申请公布日期
1965.02.16
申请号
US19590844493
申请日期
1959.10.05
申请人
JOSEF GROAK
发明人
GROAK JOSEF
分类号
G11B5/74;G11B5/86
主分类号
G11B5/74
代理机构
代理人
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