DEVELOPMENT OF BIODEGRADABLE LUBRICATING OIL FOR TURBINE BEARING FROM PALM KERNEL AND CASTOR OILS. FJS [Internet]. 2025 Apr. 30 [cited 2025 Sep. 12];9(4):145-54. Available from: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/3318