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kalibreerimine, mis teostatakse koha peal, kasutades mõõdunõud, etalonarvestit või torupruuverit, calibration performed on site using a measuring vessel, a reference meter or a pipe tester
meter proving . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/meter%20proving/1/eng (17.08.2026)