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发明名称
Apparatus for directional tubing perforation
摘要
申请公布号
US3342275(A)
申请公布日期
1967.09.19
申请号
US19630306843
申请日期
1963.09.05
申请人
DRESSER INDUSTRIES, INC.
发明人
MELLIES NORMAN J.
分类号
E21B43/119
主分类号
E21B43/119
代理机构
代理人
主权项
地址
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