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发明名称
Spiraled paraffin remover for oil wells
摘要
申请公布号
US2595025(A)
申请公布日期
1952.04.29
申请号
US19470770229
申请日期
1947.08.23
申请人
TRIPPLEHORN JAMES C
发明人
TRIPPLEHORN JAMES C.
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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