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发明名称
GEAR FOR PROTECTION OF GROUTING STONE FROM DESTRUCTION WITH PERFORATION
摘要
申请公布号
RU2011784(C1)
申请公布日期
1994.04.30
申请号
SU19914938883
申请日期
1991.05.24
申请人
KAZAROV GENNADIJ KONSTANTINOVICH
发明人
TYRTYSHNYJ GRIGORIJ A;KAZAROV GENNADIJ K;LITVIN IVAN D;GEJMASH GENNADIJ I;VOLOSHKO GENNADIJ N
分类号
E21B17/08;(IPC1-7):E21B17/08
主分类号
E21B17/08
代理机构
代理人
主权项
地址
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