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发明名称
摘要
申请公布号	KR200343253(Y1)	申请公布日期	2004.03.03
申请号	KR20030032620U	申请日期	2003.10.17
申请人		发明人
分类号	E21B12/00	主分类号	E21B12/00
代理机构		代理人
主权项
地址

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