Great variety of spare parts poses the biggest challenge, since the availability of parts.process reliability have to
be guaranteed.This can be accomplished through accurate and timely delivery either through preventative maintenance
measures or in case of emergencies.The fundamental reason for having a refrigerator is to keep food cold.Cold
temperatures help food stay fresh longer. The basic idea behind refrigeration is to slow down the activity of bacteria
which all food contains so that it takes longer for the bacteria to spoil the food.For example, bacteria will spoil
milk in two or three hours if the milk is left out on the kitchen counter at room temperature. However, by reducing the
temperature of the milk, it will stay fresh for a week or two the cold temperature inside the refrigerator decreases
the activity of the bacteria that much. By freezing the milk you can stop the bacteria altogether, and the milk can
last for months until effects like freezer burn begin to spoil the milk in non-bacterial ways.
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