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Rockwelli kõvadust iseloomustav suurus, mis on mõõdetav teemant-/kõvasulamkoonuse materjalisse sissesurumisega jõuga 588 N, A-skaala, Rockwell hardness measured by indendation of hard steel/diamond ball to a material with load of 588 N, scale A
Rockwelli kõvadusarv A-skaala järgi . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/Rockwelli%20k%C3%B5vadusarv%20A-skaala%20j%C3%A4rgi/1/est (14.08.2026)