TRIBOLOGICAL EFFECT OF PALM STERIN AND ENGINE OIL (CMEO) ON PURE ALUMINIUM PIN STEEL DISC WITH VARIES SPEED AND CONSTANT LOAD. J. Teknol. [Internet]. 2019 Sep. 22 [cited 2024 Dec. 19];81(6). Available from: https://journals.utm.my/jurnalteknologi/article/view/13764