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摘要
申请公布号
DE2102875(A1)
申请公布日期
1972.07.13
申请号
DE19712102875
申请日期
1971.01.22
申请人
发明人
分类号
G11B23/40;(IPC1-7):G11B23/38
主分类号
G11B23/40
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