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发明名称
A GROUND DRILLING HAMMER AND THE DRIVING METHOD
摘要
申请公布号
CA2589916(A1)
申请公布日期
2006.06.15
申请号
CA20052589916
申请日期
2005.12.01
申请人
LIM, BYUNG-DUK
发明人
LIM, BYUNG-DUK
分类号
E21B1/30
主分类号
E21B1/30
代理机构
代理人
主权项
地址
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