Uploaded August 2019 | Updated September 2026, 1 week ago

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In underground coal mining ventilation is an important issue. Fresh air for the miners is transported into the mine by enormous ventilation systems. In order to guide the fresh air within the tunnels the ventilators are supported by special constructions such as air doors. They deflect the flow of fresh air and guide it into the correct direction to make sure that every working area within the mine is ventilated properly.