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| Engineering a Top Secret WW2 bunker industrial engineering ventilation hvac |
In this video we explore an abandoned WW2 military bunker and take a look at the engineering that went into it from the construction through to air filtration, cooling, gas attack protection and emergency life support systems. The bunker is sealed and not accessible to the general public except for special occasions. The main central plant has remained untouched since its construction in 1939.
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