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经营范围
发明名称
Well casing joint
摘要
申请公布号
US2111196(A)
申请公布日期
1938.03.15
申请号
US19350008278
申请日期
1935.02.26
申请人
THE NATIONAL SUPPLY COMPANY
发明人
TEXTER HOWARD G.
分类号
E21B17/042;F16L15/00
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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