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发明名称
DEVICE FOR EXTENSION OF MINE FLEXIBLE VENTILATION PIPELINE
摘要
申请公布号
SU1700259(A1)
申请公布日期
1991.12.23
申请号
SU19894674802
申请日期
1989.04.05
申请人
DO POLT INSTITUT
发明人
SUKHORUKOV VIKTOR P,SU;PRIVALOV NIKITA I,SU;LYUBARSKIJ BORIS S,SU;KOVALCHUK YURIJ V,SU;KUZNETSOV VASILIJ V,SU
分类号
E21F1/04
主分类号
E21F1/04
代理机构
代理人
主权项
地址
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