Aliff Abdul Rahman, Aznizam Ahmad. A Comparative Study of NAK80 Steel and Beryllium Copper Moulds for Injection Moulding of Polypropylene Material. peat [Internet]. 2024 Jun. 10 [cited 2026 Aug. 15];5(1):387-92. Available from: https://periodical.uthm.edu.my/index.php/peat/article/view/14578