болван . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/%D0%B1%D0%BE%D0%BB%D0%B2%D0%B0%D0%BD/1/rus (10.08.2026)
болван . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/%D0%B1%D0%BE%D0%BB%D0%B2%D0%B0%D0%BD/1/rus (10.08.2026)