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发明名称
METHOD OF DETERMINING AIR RESISTANCE OF FRICTION TO GAS-AIR STREAM OF GAS-RICH MINE WORKING
摘要
申请公布号
SU1509543(A1)
申请公布日期
1989.09.23
申请号
SU19874199185
申请日期
1987.02.20
申请人
KUZBASSKIJ POLT INSTITUT
发明人
KOLMAKOV VLADISLAV A,SU;KOLMAKOV VLADIMIR V,SU;KOLMAKOV ANATOLIJ V,SU
分类号
E21F1/00;E21F7/00
主分类号
E21F1/00
代理机构
代理人
主权项
地址
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