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发明名称
DISPOSITIF ENTRANT EN CONTACT AVEC UN TROU DE SONDE, DESTINE A UN ENSEMBLE DE PERCAGE
摘要
申请公布号
BE871336(A1)
申请公布日期
1979.02.15
申请号
BE19782057360
申请日期
1978.10.18
申请人
TECHNICAL DRILLING TOOLS INC.
发明人
G. BASSINGER
分类号
E21B17/10;(IPC1-7):E21B/
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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