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发明名称
DOWN HOLE AND STEEL PRESSING APPARATUS FOR ROCK BASE AND METHOD USING THE SAME
摘要
申请公布号
KR20110111637(A)
申请公布日期
2011.10.12
申请号
KR20100030811
申请日期
2010.04.05
申请人
KIM, TAE WOO
发明人
KIM, TAE WOO
分类号
E21B7/20;E02D5/04;E02D7/26
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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