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发明名称
DEVICE FOR CHECKING STUDENTS KNOWLEDGE
摘要
申请公布号
SU877599(A1)
申请公布日期
1981.10.30
申请号
SU19802884947
申请日期
1980.02.18
申请人
ZAPOROZHSKIJ INDUSTRIALNYJ INSTITUT
发明人
PRUDENKO NIKOLAJ N,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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