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发明名称
Well swab
摘要
申请公布号
US2619393(A)
申请公布日期
1952.11.25
申请号
US19470780960
申请日期
1947.10.20
申请人
WILSON ROBERT A;WILSON JAMES A
发明人
WILSON ROBERT A.;WILSON JAMES A.
分类号
E21B37/10
主分类号
E21B37/10
代理机构
代理人
主权项
地址
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