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发明名称
Method of severing and milling a well casing
摘要
申请公布号
US2690218(A)
申请公布日期
1954.09.28
申请号
US19520313238
申请日期
1952.10.06
申请人
ROBISHAW EARL J
发明人
ROBISHAW EARL J.
分类号
E21B29/00;E21B43/112
主分类号
E21B29/00
代理机构
代理人
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