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发明名称
Block becket for use in a wellbore derrick
摘要
申请公布号
USD523210(S1)
申请公布日期
2006.06.13
申请号
US20040208313F
申请日期
2004.06.24
申请人
VARCO I/P, INC.
发明人
FOLK ROBERT ALDEN;FOLK STEVEN LORNE
分类号
主分类号
代理机构
代理人
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