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经营范围
发明名称
Cleaning blackboard dusters
摘要
申请公布号
GB2278770(A)
申请公布日期
1994.12.14
申请号
GB19930011734
申请日期
1993.06.07
申请人
发明人
分类号
A47L7/00;B43L21/02;(IPC1-7):A46B17/06;A47L13/502
主分类号
A47L7/00
代理机构
代理人
主权项
地址
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