АРСС Д. Кузнецов Способы огнезащиты металлических каркасов
2 weeks ago 00:32:23 1
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![Что же такое энтропия? [Veritasium]](https://sun9-20.userapi.com/8Oe1dulWiZqtIbMEMni1A3FIFcYPjyuAFK6vdQ/kR4F-aB0YPs.jpg)
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