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发明名称
EDUCATIONAL APPARATUS
摘要
申请公布号
GB8619195(D0)
申请公布日期
1986.09.17
申请号
GB19860019195
申请日期
1986.08.06
申请人
PENTON, D R
发明人
分类号
主分类号
代理机构
代理人
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