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发明名称
摘要
申请公布号
JPS606859(Y2)
申请公布日期
1985.03.06
申请号
JP19790152978U
申请日期
1979.11.02
申请人
发明人
分类号
G09B27/00;(IPC1-7):G09B27/00
主分类号
G09B27/00
代理机构
代理人
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