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发明名称
Self-contained closure mechanism for a core barrel inner tube assembly
摘要
申请公布号
US5230390(A)
申请公布日期
1993.07.27
申请号
US19920847358
申请日期
1992.03.06
申请人
BAKER HUGHES INCORPORATED
发明人
ZASTRESEK, JIRI;RADFORD, STEVEN R.
分类号
E21B21/10;E21B25/00
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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