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经营范围
发明名称
Casing head
摘要
申请公布号
US2617485(A)
申请公布日期
1952.11.11
申请号
US19470733780
申请日期
1947.03.11
申请人
REGAN FORGE AND ENGINEERING COMPANY
发明人
THATCH JOHN W.
分类号
E21B33/04
主分类号
E21B33/04
代理机构
代理人
主权项
地址
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