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发明名称
Teaching aid.
摘要
申请公布号
ZA200002912(B)
申请公布日期
2001.01.31
申请号
ZA20000002912
申请日期
2000.06.09
申请人
WELDON-MING, RICHARD, STEWART
发明人
WELDON-MING, RICHARD, STEWART
分类号
G09B
主分类号
G09B
代理机构
代理人
主权项
地址
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