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发明名称
(U1 Y) ;JUEGO DIDACTICO DE ENSAMBLAJE DE PIEZAS TETRAEDRICAS REGULARES E IRREGULARES
摘要
申请公布号
ES1044141(U1)
申请公布日期
2000.03.01
申请号
ES19990002211
申请日期
1999.08.10
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