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发明名称
摘要
申请公布号
JPS6192972(U)
申请公布日期
1986.06.16
申请号
JP19840177906U
申请日期
1984.11.21
申请人
发明人
分类号
G09B23/18;(IPC1-7):G09B23/18
主分类号
G09B23/18
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代理人
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