Умная система вентиляции в птичнике
рассказ о системе воздуха обмена в птичнике
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![Умный Медик [УМ] - Ликворная система мозга](https://sun9-14.userapi.com/vg4VmcwexETueAmgpsjKkdhQ8EAlLipw4dqPKQ/JeItpzOaNBM.jpg)
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