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发明名称
Core catcher
摘要
申请公布号
US2152341(A)
申请公布日期
1939.03.28
申请号
US19360076476
申请日期
1936.04.25
申请人
FRANCIS BAKER CARL
发明人
BAKER CARL FRANCIS
分类号
E21B25/14
主分类号
E21B25/14
代理机构
代理人
主权项
地址
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