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发明名称
QUEBRA CABECA EDUCATIVO
摘要
申请公布号
BR6100662(U)
申请公布日期
1982.12.28
申请号
BR19810000662U
申请日期
1981.05.22
申请人
KWUA HU CHUEN
发明人
KWUA HU CHUEN
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主分类号
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