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经营范围
发明名称
SYSTEM FOR ACTIVE DAMPING OF DRILL STRING
摘要
申请公布号
RU1799987(C)
申请公布日期
1993.03.07
申请号
SU19914919046
申请日期
1991.02.07
申请人
N-PROIZV KOOPERATIV "EKV@DKO"
发明人
ZAMIKHOVSKIJ LEONID M,SU;OGORODNIKOV PETR I,SU;SURNIN LEONID S,SU;KOGUCH YAROSLAV R,SU
分类号
E21B17/06;E21B44/00
主分类号
E21B17/06
代理机构
代理人
主权项
地址
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