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经营范围
发明名称
DUSTER FOR A BLACKBOARD
摘要
申请公布号
GB9119386(D0)
申请公布日期
1991.10.23
申请号
GB19910019386
申请日期
1991.09.11
申请人
CHEN-JEAM-YAUE
发明人
分类号
B43L21/02
主分类号
B43L21/02
代理机构
代理人
主权项
地址
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