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发明名称
Innretning for setting av en ringformet tetning
摘要
申请公布号
NO20022432(A)
申请公布日期
2002.07.19
申请号
NO20020002432
申请日期
2002.05.23
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV
发明人
HEIJNEN, WILHELMUS HUBERTUS PAULUS MARIA
分类号
E21B33/12;E21B23/04;E21B33/10;(IPC1-7):E21B23/04
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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