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发明名称
Method and apparatus for recovering pressure gas from oil wells
摘要
申请公布号
US1798774(A)
申请公布日期
1931.03.31
申请号
US19300462177
申请日期
1930.06.19
申请人
SINCLAIR OIL & GAS COMPANY
发明人
YATES LOUIS N.
分类号
E21B43/12;E21B43/34
主分类号
E21B43/12
代理机构
代理人
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