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发明名称
EDUCATION MATERIAL OF CONSTRUCTION
摘要
申请公布号
KR910002410(Y1)
申请公布日期
1991.04.11
申请号
KR19880006574U
申请日期
1988.05.02
申请人
CHO, SEOG-KU
发明人
CHO, SEOG-KU
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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