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structural member with a cross-section resembling the letter “I”, konstruktsioonielement, mille ristlõige meenutab I-tähte
I-section . Sisearhitektuuri terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//sarh/I-section/1/eng (19.06.2026)
