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发明名称
FREMGANGSMAADE OG ANLAEG TIL STYRET RETNINGSBORING AF BOREHULLER
摘要
申请公布号
DK257586(D0)
申请公布日期
1986.05.30
申请号
DK19860002575
申请日期
1986.05.30
申请人
ANALYST INT SA
发明人
LEISING LAWRENCE J.
分类号
E21B7/06;E21B7/08;E21B7/18;(IPC1-7):E21B/
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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