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kahe paralleelse tallaga, I-kujulise ristlõikega üldotstarbeline profiilmetall (vt profiilmetall), a rolled-steel joist (section) of I-section (see: structural shapes)
двутавровая балка . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/%D0%B4%D0%B2%D1%83%D1%82%D0%B0%D0%B2%D1%80%D0%BE%D0%B2%D0%B0%D1%8F%20%D0%B1%D0%B0%D0%BB%D0%BA%D0%B0/1/rus (21.06.2026)