Солнечные водонагреватели для дома и дачи
Домашний эксперимент по нагреву воды в вакуумной трубке.
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![Дом на Колёсах - Солнечные панели, водонагреватель и т.д. [17 серия]](https://sun9-52.userapi.com/QqZQDyTIXEvONoZ_PBMByh1hOsoBwTD2cup0WA/bKoOr_8Z6yI.jpg)
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