Stairs in the underground ventilation shaft of the metro under construction

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Size: 3709px × 5500px
Photo credit: © Vsevolod Chuvanov / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: concrete, conditioning, construction, engineering, high, industrial, industry, iron, ladder, large, metal, metro, modern, shaft, stairs, steel, subway, technology, tube, underground, urban, ventilation