食品和动物饲料的微生物学-酵母和霉菌计数的水平方法-第2部分:水分活度小于或等于0.95的产品菌落计数技术Microbiology of food and animal feeding stuffs - Horizontal method for the enumeration of yeasts and moulds - Part 2: Colony count technique in products with water activity less than or equal to 0,95