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发明名称
Method of and apparatus for controlling gas wells
摘要
申请公布号
US1949323(A)
申请公布日期
1934.02.27
申请号
US19320606693
申请日期
1932.04.21
申请人
OTIS HERBERT C
发明人
OTIS HERBERT C.
分类号
E21B33/03
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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