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经营范围
发明名称
WELLHEAD SEAL
摘要
申请公布号
EP0289105(A3)
申请公布日期
1989.08.16
申请号
EP19880300167
申请日期
1988.01.11
申请人
CAMERON IRON WORKS USA, INC.
发明人
CASSITY, THOMAS G.;GULLION, STEVEN D.
分类号
E21B33/035;E21B33/00;E21B33/04;F16J15/08;(IPC1-7):E21B33/04
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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