タイトルまたは説明

The details: ***** tank: stainless steel SUS ***2B, welded by argon arc to form good antioxidation.Water is drinkable. 2. Outer tank: painted steel, strong and anticorrosion effectively. 3 .Thermal insulator: one machine-blowing polyurethane foam with a thickness of ***** It turns out to achieve best heat preservation. 4. Frame : coated galvanized steel，it adapts to many angles accord to roofs . 5. Vacuum tube: made of borosilicate glass, which features excellent solar heat absorption and minimal heat refelecting properties.