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发明名称
Juego educativo para el dominio de las tablas de multiplicar
摘要
申请公布号
ES79925(U)
申请公布日期
1960.06.16
申请号
ES19250000799U
申请日期
1960.03.31
申请人
FRAU MATAS, JUAN
发明人
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主分类号
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