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发明名称
Aakkosten opettamisessa käytettävä väline
摘要
申请公布号
FI21672(A)
申请公布日期
1946.11.09
申请号
FI19450005299
申请日期
申请人
WESTERSTRAND PAUL
发明人
WESTERSTRAND PAUL
分类号
G09B1/00;G09B17/00;(IPC1-7):G09B17/00
主分类号
G09B1/00
代理机构
代理人
主权项
地址
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