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发明名称
WELLHEAD ASSEMBLY
摘要
申请公布号
GB2116608(B)
申请公布日期
1985.09.25
申请号
GB19830004540
申请日期
1983.02.18
申请人
* CAMERON IRON WORKS INC
发明人
JERRY D * SMITH;EDWARD J * SZYMCZAK
分类号
E21B17/10;E21B33/03;E21B33/04;(IPC1-7):E21B33/04
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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