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经营范围
发明名称
Well manifold
摘要
申请公布号
US2590688(A)
申请公布日期
1952.03.25
申请号
US19460709812
申请日期
1946.11.14
申请人
GRAY TOOL COMPANY
发明人
CRAIN ROBERT L.
分类号
E21B33/03
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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