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经营范围
发明名称
Wellhead sealing arrangement
摘要
申请公布号
US2496190(A)
申请公布日期
1950.01.31
申请号
US19470720004
申请日期
1947.01.03
申请人
CAMERON IRON WORKS
发明人
WORKS MADDEN T.
分类号
E21B33/00;E21B33/04
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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