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发明名称
Eraser for blackboard
摘要
申请公布号
GB2471101(A)
申请公布日期
2010.12.22
申请号
GB20090010400
申请日期
2009.06.17
申请人
MING-FENG YU
发明人
MING-FENG YU
分类号
B43L19/00;B43L21/02
主分类号
B43L19/00
代理机构
代理人
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地址
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