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发明名称
OPENING AND SHUTTING BLACKBOARD OF ASCENT AND DESCENT
摘要
申请公布号
KR0123185(Y1)
申请公布日期
1998.10.15
申请号
KR19960011650U
申请日期
1996.05.13
申请人
JANG, CHANG-HO
发明人
JANG, CHANG-HO
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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