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经营范围
发明名称
Well packer
摘要
申请公布号
US2568295(A)
申请公布日期
1951.09.18
申请号
US19460665485
申请日期
1946.04.27
申请人
PAGE OIL TOOLS, INC.
发明人
PAGE JOHN S.
分类号
E21B33/126
主分类号
E21B33/126
代理机构
代理人
主权项
地址
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