Raw materials and their technical role in the formal and functional system of the industrial product. Journal of the College of Basic Education, [S. l.], v. 31, n. 132, p. 299–311, 2025. DOI: 10.35950/cbej.v31i132.13668. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/13668.. Acesso em: 24 jun. 2026.