Air protection

The ventilation system of the hopper 42 begins with powerful engines, they rotated impressive drums, which created an area of low pressure where the air from the surface and failed, and then distributed over the object. Moreover, the ventilation shaft on the surface is disguised as Windows on a residential building. In the case of a nuclear explosion, these Windows were buried with metal seals for several hours until the radioactive dust settles, and then the filtration plants with coal filters of different types were in operation, which would purify the air coming from the surface from the remains of radioactive dust

Details can be found on the tour

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