Ventilation system with air filtration facility for protection against chemical weapons in underground bomb shelter for a few thousand people. Focus o

---

Ventilation system with air filtration facility for protection against chemical weapons in underground bomb shelter for a few thousand people. Focus on the center of the frame

---

Size: 5402px × 3440px
Photo credit: © Vsevolod Chuvanov / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: air, armored, asylum, big, black, bunker, chemical, cold, defense, door, duct, entrance, fallout, fan, filtration, hand, hermetically, industrial, iron, pipe, protection, protective, refuge, room, secure, security, shelter, structure, supply, underground, valve, ventilation, war, weapons, wheel, work, yellow