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发明名称
Pellet impact reaming apparatus
摘要
申请公布号
US2743086(A)
申请公布日期
1956.04.24
申请号
US19520268823
申请日期
1952.01.29
申请人
ESSO RESEARCH AND ENGINEERING COMPANY
发明人
ROTH MORRIS
分类号
E21B7/16;E21B10/26
主分类号
E21B7/16
代理机构
代理人
主权项
地址
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