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发明名称
MEANS OF INSTRUCTION FOR MATHEMATICS TEACHING
摘要
申请公布号
CS8706669(A1)
申请公布日期
1990.03.14
申请号
CS19870006669
申请日期
1987.09.15
申请人
MELC MIROSLAV,CS
发明人
MELC MIROSLAV,CS
分类号
G09B23/04;(IPC1-7):G09B23/04
主分类号
G09B23/04
代理机构
代理人
主权项
地址
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