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suurus, mis iseloomustab omadust olla piisavalt kõva metalli lõikamiseks isegi tuhmpunaseks kuumutamisel, quantity that characterize the property of being hard enough to cut metal even when heated to a dull-red color
punakõvadus . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/punak%C3%B5vadus/1/est (17.07.2026)
