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发明名称
DEVICE FOR EXAMINING KNOWLEDGE OF STUDENTS
摘要
申请公布号
SU1456986(A1)
申请公布日期
1989.02.07
申请号
SU19864140292
申请日期
1986.09.04
申请人
KADUSHKIN EVGENIJ V,SU;KADUSHKIN ALEKSANDR E,SU
发明人
KADUSHKIN EVGENIJ V,SU;KADUSHKIN ALEKSANDR E,SU
分类号
G09B7/07
主分类号
G09B7/07
代理机构
代理人
主权项
地址
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