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发明名称
摘要
申请公布号
KR200340958(Y1)
申请公布日期
2004.02.05
申请号
KR20030033623U
申请日期
2003.10.27
申请人
发明人
分类号
E21B19/083
主分类号
E21B19/083
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代理人
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地址
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