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发明名称
Well tools
摘要
申请公布号
US3088521(A)
申请公布日期
1963.05.07
申请号
US19600020606
申请日期
1960.04.07
申请人
OTIS ENGINEERING CORPORATION
发明人
GRAVES SHELBY J.
分类号
E21B23/02;E21B23/03
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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