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发明名称
VISUAL AID ON MATHEMATICS
摘要
申请公布号
SU1053135(A1)
申请公布日期
1983.11.07
申请号
SU19823469111
申请日期
1982.07.15
申请人
ISTUSHKIN VALERIJ F,SU;SHUTILOV ALEKSANDR,SU
发明人
ISTUSHKIN VALERIJ F,SU;SHUTILOV ALEKSANDR I,SU
分类号
G09B23/02;(IPC1-7):G09B23/02
主分类号
G09B23/02
代理机构
代理人
主权项
地址
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