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发明名称
IMPROVED INFLATABLE PACKING DEVICE AND METHOD OF SEALING
摘要
申请公布号
GB9118261(D0)
申请公布日期
1991.10.09
申请号
GB19910018261
申请日期
1991.08.23
申请人
BAKER HUGHES INC.
发明人
分类号
E21B33/127
主分类号
E21B33/127
代理机构
代理人
主权项
地址
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