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经营范围
发明名称
Wellhead apparatus
摘要
申请公布号
US3171489(A)
申请公布日期
1965.03.02
申请号
US19620192174
申请日期
1962.05.03
申请人
ARMCO STEEL CORPORATION
发明人
COLE CHARLES M.;BICKEL PAUL E.;JR. WILLIAM W. WORD,
分类号
E21B33/043
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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