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发明名称
Improvements in and relating to magnetic recording mediums
摘要
申请公布号
GB883428(A)
申请公布日期
1961.11.29
申请号
GB19600015287
申请日期
1960.05.02
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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