PERFORMANCE ANALYSIS OF A VCR SYSTEM USING R600A DOPED WITH NANO – LUBRICANTS. int. J. Eng. Res. Sci. Tech. [Internet]. 2026 Apr. 7 [cited 2026 Sep. 8];22(2):1798-80. Available from: https://ijerst.org/index.php/ijerst/article/view/2520