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发明名称
VISUAL AID FOR GEOGRAPHY
摘要
申请公布号
RU2012067(C1)
申请公布日期
1994.04.30
申请号
SU19914951379
申请日期
1991.06.28
申请人
SHEBALIN YAROSLAV P
发明人
SHEBALIN YAROSLAV P
分类号
G09B27/02;(IPC1-7):G09B27/02
主分类号
G09B27/02
代理机构
代理人
主权项
地址
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