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发明名称
摘要
申请公布号
JPS63168472(U)
申请公布日期
1988.11.02
申请号
JP19870062349U
申请日期
1987.04.23
申请人
发明人
分类号
G09B29/00;G09B29/04;(IPC1-7):G09B29/04
主分类号
G09B29/00
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