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发明名称
ANORDNING FOR FASTSKRUING OG LOESSKRUING AV GJENGETE ROERKOPLINGER.
摘要
申请公布号
NO154101(C)
申请公布日期
1986.07.16
申请号
NO19820000781
申请日期
1982.03.11
申请人
VARCO INTERNATIONAL INC.
发明人
BOYADJIEFF, GEORGE I.
分类号
E21B19/16;B25B13/50;B25B27/00;E21B19/20;(IPC1-7):E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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