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non-destructive testing method for scanning sub-surface targets in concrete elements, mittepurustav katsemeetod aluspinna sihtmärkide skaneerimiseks betoonelementides
ultrasonic pulse-echo defectoscopy . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/ultrasonic%20pulse-echo%20defectoscopy/1/eng (17.07.2026)