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发明名称
摘要
申请公布号
JPH03122475(U)
申请公布日期
1991.12.13
申请号
JP19900031711U
申请日期
1990.03.27
申请人
发明人
分类号
G09B15/00;G10K15/04;G11B27/34;H04R1/02;(IPC1-7):G09B15/00
主分类号
G09B15/00
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