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发明名称
摘要
申请公布号
JPS57134674(U)
申请公布日期
1982.08.21
申请号
JP19810019355U
申请日期
1981.02.16
申请人
发明人
分类号
G01R31/02;G11B15/02;G11B15/087;(IPC1-7):G01R31/02
主分类号
G01R31/02
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