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摘要
申请公布号
JPS5933011(Y2)
申请公布日期
1984.09.14
申请号
JP19800146189U
申请日期
1980.10.13
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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