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发明名称
BLACK BOARD ERASER
摘要
申请公布号
KR810002511(Y1)
申请公布日期
1981.12.28
申请号
KR19810000369U
申请日期
1981.01.20
申请人
YOO S
发明人
YOO S
分类号
B43L21/00;(IPC1-7):B43L21/00
主分类号
B43L21/00
代理机构
代理人
主权项
地址
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