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发明名称
Dreieholdere for deksler på utblåsningssikring
摘要
申请公布号
NO20034896(D0)
申请公布日期
2003.11.03
申请号
NO20030004896
申请日期
2003.11.03
申请人
HYDRIL CO
发明人
HEMPHILL, EDWARD RYAN
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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