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katsekeha/teimik U-kujulise sisselõikega purustustöö väärtuse määramiseks löökpaindel Charpy meetodil (vt Charpy löökpaindekatse), a test piece with U-shaped indentation in an edge or surface (see: Charpy test)
U-notch impact test piece . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/U-notch%20impact%20test%20piece/1/eng (05.08.2026)