вентилациони систем

вентилациони систем

A method for reducing methane concentrations in coal mines to non-explosive levels by blowing air across the mine face and using large exhaust fans to remove methane while mining operations proceed.

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Deel van toespraak: noun
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Industrie/Domein: Energy
Category: Coal; Natural gas; Petrol
Company: EIA
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Отвор који је направљен преко стубова који омогућавају вентилацију.

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