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发明名称
Anordning for sammensetning av r°r ved hjelp av stumpkoniske skruegjenger
摘要
申请公布号
NO303592(B1)
申请公布日期
1998.08.03
申请号
NO19910004604
申请日期
1991.11.25
申请人
VALLOUREC MANNESMANN OIL & GAS FRANCE;SUMITOMO METAL INDUSTRIES LTD
发明人
NOEL, THIERRY;NAGASAKU, SHIGEO
分类号
E21B17/042;F16L15/00;(IPC1-7):F16L15/00
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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