GB/T 6609.27-2023 Methods of chemical analysis and determination of physical properties of alumina Part 27: Particle size analysis and sieving method has been changed from GB/T 6609.28-2004 Chemical analysis methods and determination of physical performance of alumina Determination of the fine particle size distribution(less than 60μm)-Method using electroformed sieves.
GB/T 6609.27-2023 Methods of chemical analysis and determination of physical properties of alumina Part 27: Particle size analysis and sieving method has been changed from GB/T 6609.37-2009 Chemical analysis methods and determination of physical performance of alumina-Part 37: Determination of the particles size content less than 20μm.
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