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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
threshold limit value–ceiling . Keemiaterminite baas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kem/threshold%20limit%20value%E2%80%93ceiling/1/eng (19.07.2026)
