Underground tunnel in coal mine with closed airlock doors

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Size: 4000px × 2670px
Photo credit: © Marcin Kosciolek / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: access, airlock, coal, construction, doors, engineering, entrance, environment, equipment, facility, hazardous, industrial, industry, infrastructure, interior, logistics, machinery, measures, mining, operations, passage, process, production, safety, shaft, structure, subterranean, system, technology, transportation, tunnel, tunneling, underground, ventilation