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katalüüsi aktiivsuse erinimetusega SI tuletatud ühiku katal tähis, symbol of SI derived unit with special name katal for catalytic activity
kat . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/kat/1/est (01.07.2026)
