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When we carry out ventilation in our house, condensation in the ventilation pipes is inevitable, this video shows how to reliably, simply and permanently solve this problem. Here how to make a crown and other videos on this topic - http://surl.li/ebxil Thank the master for advice - https://www.donationalerts.com/r/Serg... •••••••••••••••••••••••••••••••••••••••••••••• Ask questions here - https://goo.gl/EPxxh1 I will answer first My blog on boosty - https://boosty.to/mastersergey