poterya-energii потеря энергии https://igorzuevich.com/wp-content/uploads/2015/03/logoizbl2.png 0 0 Igor Zuevich https://igorzuevich.com/wp-content/uploads/2015/03/logoizbl2.png Igor Zuevich2015-12-21 19:03:462015-12-21 19:03:59poterya-energii
