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经营范围
发明名称
DRILLING APPARATUS WITH AN ONEBODY SHANK AND SWIVEL
摘要
申请公布号
KR100710890(B1)
申请公布日期
2007.04.27
申请号
KR20050037593
申请日期
2005.05.04
申请人
发明人
分类号
E21B17/04
主分类号
E21B17/04
代理机构
代理人
主权项
地址
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