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为了排除井下巷道的有毒气体(工作面每使用一匹马力的柴油机械必须供给6米3/分的空气),顿巴斯水力采煤机械研究所研制成功苏联最大的BM—12m局部扇风机。
In order to exclude the poisonous gas in underground tunnels (6 m 3 / min of air must be supplied for every 1 hp of diesel engine used on the working face), the Donbass Institute of Hydraulic Coal Mining Machinery successfully developed the largest BM-12m local fan in the Soviet Union.