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发明名称
UNDERDRILLING BIT
摘要
申请公布号
CA766637(A)
申请公布日期
1967.09.05
申请号
CAD766637
申请日期
申请人
THE ATLANTIC REFINING COMPANY
发明人
JAMES M. CLEARY
分类号
主分类号
代理机构
代理人
主权项
地址
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