ANALYSIS AND FABRICATION OF AN INSTANTANEOUS WATER COOLER BY USING TERTAFLUOROETHANE AND ISOBUTANE (R134a) . IEJRD - International Multidisciplinary Journal [Internet]. 2021 May 8 [cited 2026 Sep. 30];6(2):7. Available from: https://www.iejrd.com/index.php/iejrd/article/view/1915