Manufacture of electrical transformer cores that operate at medium and high frequencies. Journal of the College of Basic Education, [S. l.], v. 18, n. 74, p. 613–642, 2023. DOI: 10.35950/cbej.v18i74.9371. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9371.. Acesso em: 21 apr. 2025.