The Effect of Variation in the Composition of Candlenut Shell Charcoal Powder/Epoksi Composite on Hardness Value, Friction Coefficient and Specific Wear Rate. JTM [Internet]. 2023 Apr. 30 [cited 2026 Feb. 27];14(1):33-7. Available from: https://jtm.itp.ac.id/index.php/jtm/article/view/773