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发明名称
Apparatus for recovering objects from wells
摘要
申请公布号
US2154654(A)
申请公布日期
1939.04.18
申请号
US19380188310
申请日期
1938.02.02
申请人
ARMENTROUT
发明人
ARMENTROUT ARTHUR L.;PHILLIPS CECIL H.
分类号
E21B31/00
主分类号
E21B31/00
代理机构
代理人
主权项
地址
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