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发明名称
LEARNING APPARATUS
摘要
申请公布号
JPS5570867(A)
申请公布日期
1980.05.28
申请号
JP19790091098
申请日期
1979.07.18
申请人
RICOH KK
发明人
YAMAUCHI YOSHITOSHI;YAMAZAKI SHIGERU
分类号
G09B7/07;G09B7/00;G09B7/08
主分类号
G09B7/07
代理机构
代理人
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