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经营范围
发明名称
Hole enlarger
摘要
申请公布号
US3016099(A)
申请公布日期
1962.01.09
申请号
US19590827759
申请日期
1959.07.17
申请人
TERMINAL DRILLING AND PRODUCTION CO.
发明人
WOODRUFF CHARLES ROBERT
分类号
E21B10/28
主分类号
E21B10/28
代理机构
代理人
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地址
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