Milk hygiene practice in Norway.

bovin laitier collecte du lait control de calidad control de enfermedades dairy cattle dairy equipment dairy hygiene dairy industry disease control economic distribution factories farm buildings ganado de leche handling heat treatment higiene de la leche industria lechera instalaciones de la finca manutention milk collection milk products milking produit laitier recogida de leche traitement thermique transport transporte usine