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发明名称
Mathematical aid
摘要
申请公布号
GB0204418(D0)
申请公布日期
2002.04.10
申请号
GB20020004418
申请日期
2002.02.26
申请人
NEALE PLASTICS LIMITED
发明人
分类号
主分类号
代理机构
代理人
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