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发明名称
SINGLE RISER WITH TWO WELLHEADS
摘要
申请公布号
EP1025333(A1)
申请公布日期
2000.08.09
申请号
EP19970950844
申请日期
1997.12.04
申请人
ABB VETCO GRAY INC.
发明人
BRIDGES, CHARLES, D.
分类号
E21B7/04;E21B17/00;E21B17/10;E21B33/047;(IPC1-7):E21B7/04
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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