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发明名称
Produksjonsventil
摘要
申请公布号
NO20022512(D0)
申请公布日期
2002.05.28
申请号
NO20020002512
申请日期
2002.05.28
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV
发明人
HEIJNEN, WILHELMUS HUBERTUS PAULUS MARIA
分类号
E21B34/06;E21B41/00;E21B43/12;E21B43/30;(IPC1-7):E21B
主分类号
E21B34/06
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代理人
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