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发明名称
Opiskelukortisto kielten ensiasteen opiskelua varten
摘要
申请公布号
FI25259(A)
申请公布日期
1951.09.10
申请号
FID25259
申请日期
1939.05.02
申请人
发明人
KUKKONEN EINO
分类号
B42F19/00;G09B19/06;(IPC1-7):B42F19/00
主分类号
B42F19/00
代理机构
代理人
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