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发明名称
METHOD FOR PROTECTION OF MAIN FAN DUCT FROM FREEZING IN VENTILATION OF NORTH MINES
摘要
申请公布号
SU1717843(A1)
申请公布日期
1992.03.07
申请号
SU19884618187
申请日期
1988.12.07
申请人
INST GORNOGO DELA SEVERA YAKU
发明人
GALKIN ALEKSANDR F,SU;KURILKO ALEKSANDR S,SU;KISELEV VALERIJ V,SU;KHOKHOLOV YURIJ A,SU
分类号
E21F3/00
主分类号
E21F3/00
代理机构
代理人
主权项
地址
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