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发明名称
Apparatus for logging bores
摘要
申请公布号
US2281960(A)
申请公布日期
1942.05.05
申请号
US19390286671
申请日期
1939.07.26
申请人
GULF RESEARCH & DEVELOPMENT COMPANY
发明人
VACQUIER VICTOR V.
分类号
E21B47/04
主分类号
E21B47/04
代理机构
代理人
主权项
地址
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