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发明名称
ET SPILL SOM KAN TJENE SOM PEDAGOGISK HJELPEMIDDEL VED MATEMATIKKUNDERVISNING (PERMUTASJONSGRUPPER)
摘要
申请公布号
NO791872(A)
申请公布日期
1980.12.09
申请号
NO19790001872
申请日期
1979.06.06
申请人
STENSHOLT, EIVIND,
发明人
STENSHOLT, EIVIND,
分类号
G09B;G09B1/02;G09B23/02;(IPC1-7):G09B/
主分类号
G09B
代理机构
代理人
主权项
地址
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