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发明名称
TEACHING AID
摘要
申请公布号
ZA9107311(B)
申请公布日期
1992.05.27
申请号
ZA19910007311
申请日期
1991.09.13
申请人
HELEN LOUISE MACHADO
发明人
HELEN LOUISE MACHADO
分类号
A63F;G09B
主分类号
A63F
代理机构
代理人
主权项
地址
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