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发明名称
摘要
申请公布号
JPS63113181(U)
申请公布日期
1988.07.21
申请号
JP19870003833U
申请日期
1987.01.14
申请人
发明人
分类号
G09B7/07;(IPC1-7):G09B7/07
主分类号
G09B7/07
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