Ali J. S. Alrafadi. An Investigation Of a Solar Water Heater Using a Double-Walled Absorbent Spherical Tank and Solar Gravity For Thermal Operation. aajsr [انترنت]. 9 سبتمبر، 2024 [وثق 18 أكتوبر، 2024];2(3):305-12. موجود في: https://aajsr.com/index.php/aajsr/article/view/200