… protein substances and their derivatives, not elsewhere specified or included; hide powder, whether or not chromed. …
Explanatory notes
… protein substances and their derivatives, not elsewhere specified or included; hide powder, whether or not chromed. … substances and their derivatives , not covered by a more specific heading in the Nomenclature, including in … serum globulins, human normal immunoglobulin and antisera (specific immunoglobulins) and other blood fractions ( …