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发明名称
PROCEDE DE FABRICATION D'UNE TIGE DE FORAGE ET CETTE TIGE
摘要
申请公布号
FR2523204(B1)
申请公布日期
1987.07.10
申请号
FR19820021672
申请日期
1982.12.23
申请人
SMITH INTERNATIONAL INC
发明人
WILLIAM R. GARRETT
分类号
B23P11/00;B26F3/00;E21B17/00;E21B17/10;(IPC1-7):E21B17/10
主分类号
B23P11/00
代理机构
代理人
主权项
地址
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