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发明名称
Core catching device
摘要
申请公布号
US1858248(A)
申请公布日期
1932.05.17
申请号
US19300476300
申请日期
1930.08.19
申请人
HUGHES TOOL COMPANY
发明人
SCOTT FLOYD L.;BAGGETT HENRY T.
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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