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发明名称
Core barrel apparatus
摘要
申请公布号
AU4828597(A)
申请公布日期
1998.08.27
申请号
AU19970048285
申请日期
1997.12.11
申请人
BOART LONGYEAR INTERNATIONAL HOLDINGS, INC
发明人
JOHN C. MARSHALL
分类号
E21B25/02
主分类号
E21B25/02
代理机构
代理人
主权项
地址
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