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发明名称
ANORDNING FOR AA PAAVISE EN BORESTRENGS ADFERD I ET BOREHULL
摘要
申请公布号
NO172074(C)
申请公布日期
1993.06.02
申请号
NO19870003876
申请日期
1987.09.15
申请人
ATLANTIC RICHFIELD COMPANY
发明人
SCHUH, FRANK J.;JAN, YIH-MIN;BSEISU, AMJAD A.
分类号
E21B47/00;(IPC1-7):E21B47/00
主分类号
E21B47/00
代理机构
代理人
主权项
地址
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