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发明名称
Method of treating wells
摘要
申请公布号
US2254443(A)
申请公布日期
1941.09.02
申请号
US19380213598
申请日期
1938.06.14
申请人
MABEL E. RICHART
发明人
OSTROM GUSTAF E.
分类号
E21B43/24
主分类号
E21B43/24
代理机构
代理人
主权项
地址
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