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发明名称
Lehrbaukasten
摘要
申请公布号
DE1547501(A1)
申请公布日期
1970.02.26
申请号
DE19671547501
申请日期
1967.06.29
申请人
GIZA,KURT
发明人
GIZA,KURT
分类号
G09B23/18
主分类号
G09B23/18
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