серый чугун . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/%D1%81%D0%B5%D1%80%D1%8B%D0%B9%20%D1%87%D1%83%D0%B3%D1%83%D0%BD/1/rus (27.08.2026)
серый чугун . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/%D1%81%D0%B5%D1%80%D1%8B%D0%B9%20%D1%87%D1%83%D0%B3%D1%83%D0%BD/1/rus (27.08.2026)