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发明名称
DEVICE FOR CHECKING KNOWLEDGE OF STUDENTS
摘要
申请公布号
SU991478(A1)
申请公布日期
1983.01.23
申请号
SU19813340079
申请日期
1981.09.24
申请人
VOKHMYANIN VLADISLAV G,SU
发明人
VOKHMYANIN VLADISLAV G,SU
分类号
G09B7/02;(IPC1-7):G09B7/02
主分类号
G09B7/02
代理机构
代理人
主权项
地址
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