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发明名称
摘要
申请公布号
SU457094(A1)
申请公布日期
1975.01.15
申请号
SU19721815167
申请日期
1972.07.28
申请人
发明人
分类号
(IPC1-7):G11B5/22
主分类号
(IPC1-7):G11B5/22
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代理人
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地址
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