【TBT】KS 2769-6:2018 Admixtures for Concrete, Mortar and Grout — Test Methods Admixtures for Concrete, Mortar and Grout - Test Methods - Part 6: Infrared Analysis.
【TBT】DUS 249-3:2018 Engine Oils — Performance Classification — Part 3: API Specification for light and heavy duty Compression- ignition (diesel) engines, Second edition.