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发明名称
Dispositif didactique pour l'enseignement de la table de pythagore
摘要
申请公布号
FR1029072(A)
申请公布日期
1953.05.29
申请号
FRD1029072
申请日期
1950.12.04
申请人
发明人
ZAMBELLI ASSUNTA
分类号
G09B19/02
主分类号
G09B19/02
代理机构
代理人
主权项
地址
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