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经营范围
发明名称
Sucker rod coupling
摘要
申请公布号
US2671682(A)
申请公布日期
1954.03.09
申请号
US19510252120
申请日期
1951.10.19
申请人
PAGE OIL TOOLS INC.
发明人
PAGE JOHN S.
分类号
E21B17/046
主分类号
E21B17/046
代理机构
代理人
主权项
地址
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