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发明名称
Drilling system
摘要
申请公布号
GC0000342(A)
申请公布日期
2007.03.31
申请号
GC2000P000730
申请日期
1999.06.22
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
发明人
BEST BRUNO
分类号
E21B19/16;E21B21/02;E21B21/08;E21B21/10
主分类号
E21B19/16
代理机构
代理人
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地址
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