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发明名称
Apparatus for clearing wells
摘要
申请公布号
US2244256(A)
申请公布日期
1941.06.03
申请号
US19400337031
申请日期
1940.05.24
申请人
ELECTRICAL TREATING COMPANY
发明人
LOOMAN IRIS C.
分类号
E21B36/04
主分类号
E21B36/04
代理机构
代理人
主权项
地址
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