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经营范围
发明名称
Well reamer
摘要
申请公布号
US2035888(A)
申请公布日期
1936.03.31
申请号
US19340718592
申请日期
1934.04.02
申请人
GLOBE OIL TOOLS COMPANY
发明人
HOWARD JOHN H.
分类号
E21B10/30
主分类号
E21B10/30
代理机构
代理人
主权项
地址
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