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发明名称
CONVERTIBLE SEAL
摘要
申请公布号
CA2618693(A1)
申请公布日期
2008.07.15
申请号
CA20082618693
申请日期
2008.01.15
申请人
WEATHERFORD/LAMB, INC.
发明人
MCKEACHNIE, JOHN W.;WILLIAMSON, SCOTT E.
分类号
E21B33/12;E21B33/124;E21B33/126;E21B34/08
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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