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发明名称
MOBIL BORERIGG
摘要
申请公布号
NO169193(B)
申请公布日期
1992.02.10
申请号
NO19850000051
申请日期
1985.01.04
申请人
INCO LIMITED
发明人
ENGLAND, JOHN RICHARD;RIACH, RICHARD LLOYD
分类号
E21B7/02;E21B15/00;E21B19/08;(IPC1-7):E21C11/00
主分类号
E21B7/02
代理机构
代理人
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地址
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