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APPARATUS FOR PROTECTING MINE AIRING NETWORK FROM ACTION OF OUTBURST GAS STREAM
APPARATUS FOR PROTECTING MINE AIRING NETWORK FROM ACTION OF OUTBURST GAS STREAM
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机译:防止瓦斯涌出作用保护矿井网络的装置
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摘要
device for the protection of the mine ventilation network from the effects of gas flow, comprising шахтную cross piece and nozzle extension, отличающеес , h then,in order to повышени intensity разбав
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