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发明名称
BOREHOLE EXPANDER
摘要
申请公布号
SU1500752(A1)
申请公布日期
1989.08.15
申请号
SU19874284750
申请日期
1987.07.14
申请人
VNII GIDROGEOLOGII INZHENERNOJ GEOLOGII
发明人
BASHKATOV ALEKSEJ D,SU;AVSYUK ALEKSANDR I,SU;LASYGINA VALENTINA V,SU;TARABUKIN VALERIJ I,SU;LEPESIN VSEVOLOD I,SU;SHARAEVSKIJ LEONID P,SU;MELENTEV SERGEJ G,SU
分类号
E21B7/28
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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