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经营范围
发明名称
CORE DRILLING SYSTEM
摘要
申请公布号
CA884755(A)
申请公布日期
1971.11.02
申请号
CAD884755
申请日期
申请人
BOYLES BROS. DRILLING CO.
发明人
LYLE J. MARTINSEN
分类号
主分类号
代理机构
代理人
主权项
地址
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