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发明名称
PUNTA DI TRIVELLAZIONE
摘要
申请公布号
ITTO930218(A1)
申请公布日期
1993.10.04
申请号
IT1993TO00218
申请日期
1993.04.01
申请人
BAKER HUGHES INCORPORATED
发明人
KELLY JOSEPH L. JR.;WELSH MICHAEL F.
分类号
E21B;E21B10/22;E21B10/25;F16J15/34
主分类号
E21B
代理机构
代理人
主权项
地址
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