| 摘要 |
<p>In products such as fodder pellets made by extrusion of aqueous basic material which at a temperature higher than the boiling point of water is extruded through nozzles of an extruder mouth piece, addition of liquid substances such as for example fat can be carried out by spraying of or immersion into the substances concerned in such a way that the decreasing pressure in the steam-filled cavity of the material during cooling outside the extruder is utilized to overcome the flow resistance of the liquid additives during their inward travel from the surface of the basic material.</p> |
