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发明名称
Bi-directional barrier
摘要
申请公布号
GB2400394(B)
申请公布日期
2006.01.04
申请号
GB20040012899
申请日期
2002.12.18
申请人
BAKER HUGHES INCORPORATED
发明人
BENJAMIN HORNE;DAVID CAMERON
分类号
E21B34/08;E21B34/00;E21B34/12;E21B34/14
主分类号
E21B34/08
代理机构
代理人
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地址
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