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发明名称
HOLE ENLARGEMENT DRILLS FOR MAINTAINING DRILLED HOLE SHAPE UNDERGROUND, AND CONSTRUCTION METHOD OF PILES AND TENTION MEMBERS USING THEM
摘要
申请公布号
KR101077960(B1)
申请公布日期
2011.10.28
申请号
KR20100115026
申请日期
2010.11.18
申请人
SAMILENC
发明人
YIM, SEONG DAE;HYUN, JAE HO;CHO, HYEOUNG GWON
分类号
E21B7/28;E02D5/34
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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