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发明名称
A clust drill
摘要
申请公布号
KR100715431(B1)
申请公布日期
2007.05.08
申请号
KR20050051830
申请日期
2005.06.16
申请人
发明人
分类号
E21B10/36
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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