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发明名称
GUIDING DEVICE FOR DRILL ROD CENTERING
摘要
申请公布号
SU578427(A1)
申请公布日期
1977.10.30
申请号
SU19701439623
申请日期
1970.05.11
申请人
MATSENKO GELIJ N,SU;BARANOV OLEG N,SU;MATSENKO VLADLEN N,SU;VARSHAVSKIJ YULIJ ,SU
发明人
MATSENKO GELIJ N,SU;BARANOV OLEG N,SU;MATSENKO VLADLEN N,SU;VARSHAVSKIJ YULIJ ,SU
分类号
E21B19/24;E21B19/00;(IPC1-7):E21B19/00
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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