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发明名称
BLOC-TOY FOR LETTER TEACHING
摘要
申请公布号
KR900000976(Y1)
申请公布日期
1990.02.02
申请号
KR19870004237U
申请日期
1987.03.31
申请人
JI SEUNG-KWANG
发明人
JI SEUNG-KWANG
分类号
G09B1/10;(IPC1-7):G09B1/10
主分类号
G09B1/10
代理机构
代理人
主权项
地址
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