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What is a freezer? Quick-freezing cold storage refers to a method of quickly freezing food through its maximum ice crystal generation area and quickly freezing when the average temperature reaches -18 ° C. The temperature of the freezer is generally -15 ° C to -35 ° C. Mainly used for low-temperature fast freezing of food, medicine, medicinal materials, chemical raw materials and other items. With fast cooling, good freshness and so on. The so-called rapid freezing refers to the method of quickly freezing food when it passes through its largest ice crystal generation area and when the average temperature reaches -18 ° C.