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http://newcorediary.com/2014/10/%d0%be-%d1%81%d0%b8%d1%81%d1%82%d0%b5%d0%bc%d0%b5-%d1%82%d0%b5%d0%bf%d0%bb%d1%8b%d1%85-%d0%bf%d0%be%d0%bb%d0%be%d0%b2/
О системе теплых полов