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发明名称
LEARNING BOARD
摘要
申请公布号
JPH057511(A)
申请公布日期
1993.01.19
申请号
JP19910185718
申请日期
1991.06.28
申请人
ITOKI CREBIO CORP
发明人
SAKAMOTO CHUYA;YAMAGUCHI TSUTOMU
分类号
A47B41/06;G09B19/00;G09B19/02
主分类号
A47B41/06
代理机构
代理人
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