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https://kruglov.biz/2016/05/29/%d1%82%d1%80%d0%b5%d0%bd%d0%b8%d1%80%d0%be%d0%b2%d0%ba%d0%b0-%d0%bf%d0%be-%d1%81%d0%bf%d0%b0%d1%81%d0%b5%d0%bd%d0%b8%d1%8e-%d0%b2-%d0%bf%d0%b5%d1%89%d0%b5%d1%80%d0%b0%d1%85-%d0%b2-%d1%88%d0%b0%d1%85/
Тренировка по спасению в пещерах в шахте Каскадная