QB/T 2721 Leather chemical test Determination of water-soluble substances, water-soluble inorganic substances and water-soluble organic substances*, 2018-12-21 Update
QB/T 1276-2012 history
2012QB/T 1276-2012 Fur.Chemical tests.Determination of matter soluble in carbon tetrachloride
1991QB/T 1276-1991 Determination of carbon tetrachloride extract in fur products