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经营范围
发明名称
LEARNING APPARATUS
摘要
申请公布号
JPS63305383(A)
申请公布日期
1988.12.13
申请号
JP19870141166
申请日期
1987.06.05
申请人
MITSUI & CO LTD
发明人
OKADA SHINJI;NAGAE MISAO
分类号
G09B19/16;A63F3/06;A63F13/00
主分类号
G09B19/16
代理机构
代理人
主权项
地址
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