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]. 30 April 2023 [dikutip 21 Agustus 2025];14(1):33-7. Tersedia pada: https://jtm.itp.ac.id/index.php/jtm/article/view/773