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发明名称
Bridging plugs
摘要
申请公布号
US2808890(A)
申请公布日期
1957.10.08
申请号
US19540471439
申请日期
1954.11.26
申请人
THE BRITISH PETROLEUM COMPANY LIMITED
发明人
CLARK ARTHUR;GIBSON JOHN MACFARLANE
分类号
E21B33/134
主分类号
E21B33/134
代理机构
代理人
主权项
地址
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