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发明名称
BOREHOLE EXPANDER
摘要
申请公布号
SU1573130(A1)
申请公布日期
1990.06.23
申请号
SU19884393934
申请日期
1988.02.09
申请人
MO GORNYJ INSTITUT
发明人
PROTASOV YURIJ I,SU;GORODNICHENKO VASILIJ I,SU;KOMAROV NIKOLAJ V,SU;KUZNETSOV VIKTOR V,SU;CHERNIKOV VLADIMIR A,SU
分类号
E21B7/30;E21B7/14;E21B7/15;E21B7/28
主分类号
E21B7/30
代理机构
代理人
主权项
地址
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