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发明名称
A ROTATABLE BLACKBOARD
摘要
申请公布号
KR200173840(Y1)
申请公布日期
2000.03.15
申请号
KR19990017800U
申请日期
1999.08.25
申请人
JANG, KE ON
发明人
JANG, KE ON
分类号
B43L1/04;(IPC1-7):B43L1/04
主分类号
B43L1/04
代理机构
代理人
主权项
地址
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