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发明名称
Наглядное пособие для обучения умножению чисел
摘要
申请公布号
SU36709(A1)
申请公布日期
1934.05.31
申请号
SU19330133421
申请日期
1933.08.14
申请人
RUDAKOVA E.G.
发明人
RUDAKOVA E.G.
分类号
G09B19/02
主分类号
G09B19/02
代理机构
代理人
主权项
地址
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