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tegur, mis väljendab suhtelist aega, mil ruum ei ole hõivatud, factor indicating the proportion of time that a space is unoccupied
äraolekutegur . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/%C3%A4raolekutegur/1/est (18.07.2026)
