METHOD FOR PROTECTION OF MAIN FAN DUCT FROM FREEZING IN VENTILATION OF NORTH MINES

申请公布号：SU1717843(A1)

申请号：SU19884618187

申请日期：1988.12.07

申请公布日期：1992.03.07

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

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