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发明名称
IMPACT EXCAVATION SYSTEM AND METHOD
摘要
申请公布号
EP1787007(A2)
申请公布日期
2007.05.23
申请号
EP20050771403
申请日期
2005.07.15
申请人
PARTICLE DRILLING, INC.
发明人
TIBBITTS, GORDON
分类号
E21B7/18;E21B7/16
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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