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发明名称
INDEKSERINGSANORDNING FOR ET NEDE-I-HULLET-VERKTOEY.
摘要
申请公布号
NO902943(A)
申请公布日期
1985.10.04
申请号
NO19900002943
申请日期
1990.07.02
申请人
HALLIBURTON COMPANY
发明人
RINGGENBERG, PAUL DAVID
分类号
E21B;E21B34/06;E21B43/12;(IPC1-7):E21B34/06
主分类号
E21B
代理机构
代理人
主权项
地址
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