Airtight gates are used in case of mine flooding.
Published: 10 June 2011
[url=http://russiapedia.rt.com/galleries/deep-thrill-extreme-1200m/airtight-gates-are-used-to-regulate-air-flow/][img]https://cdn.rt.com/russiapedia-media/galleries/deep-thrill-extreme-1200m/deep-thrill-extreme-1200m_13.jpg[/img][/url]
Extreme thrill: breaking into 1,200m deep mine: Airtight gates are used in case of mine flooding. – Russiapedia Picture galleries
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