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as defined by ACGIH, concentration of a potentially toxic substance that should not be exceeded during any part of the working exposure, potentsiaalselt mürgise aine kontsentratsiooni piirväärtus, mida ei tohi kunagi ületada
lagi-künnisväärtus . Keemiaterminite baas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kem/lagi-k%C3%BCnnisv%C3%A4%C3%A4rtus/1/est (18.07.2026)
