Hello
Solar water heater vacuum tubes are divided into many models, generally with diameters of 48mm, 1600mm, 1800mm, 1900mm, 2100mm and diameters of 84mm, 1900mm and 2100mm.
Hello
Solar water heater vacuum tubes are divided into many models, generally with diameters of 48mm, 1600mm, 1800mm, 1900mm, 2100mm and diameters of 84mm, 1900mm and 2100mm.