USE OF PLASTIC INSERTS FOR MANUFACTURING OF INTERNAL CAVITY IN POWDER METALLURGY. International Journal of Engineering Sciences & Management Research, [S. l.], v. 6, n. 9, p. 1–20, 2019. Disponível em: http://ijesmr.com/index.php/ijesmr/article/view/485. Acesso em: 26 aug. 2026.