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发明名称
Anordning ved utblåsningssikring
摘要
申请公布号
NO975973(D0)
申请公布日期
1997.12.19
申请号
NO19970005973
申请日期
1997.12.19
申请人
VARCO SHAFFER INC
发明人
BRUGMAN, JAMES D.;LEVETT, BRYCE A.
分类号
E21B33/06;(IPC1-7):E21B
主分类号
E21B33/06
代理机构
代理人
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地址
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