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ELAY S.A., B. Herramientas cortadoras de engranajes. Informador Técnico, [S. l.], v. 57, p. 18–20, 1998. Disponível em: https://revistas.sena.edu.co/index.php/inf_tec/article/view/1109. Acesso em: 24 mar. 2026.