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发明名称
REVERSE CIRCULATION DRILLING MACHINE OF POWERPACK ADHERENCE TYPE
摘要
申请公布号
KR100693285(B1)
申请公布日期
2007.03.13
申请号
KR20050039222
申请日期
2005.05.11
申请人
发明人
分类号
E21B1/36
主分类号
E21B1/36
代理机构
代理人
主权项
地址
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