An inspection of the plant revealed that a cross connection in the pipes carrying the milk allowed mingling of raw milk with pasteurized milk when certain valves were incorrectly closed.

• 一项关于工厂的检验报告在输送牛奶管道的十字联结处，当某些阀门被不正确关闭时，使生牛奶和杀菌消毒过的牛奶混合。