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Cooling rate is fast, the cooling cycle is only about 20-30 minutes, the strong wind is required for 5 hours, cold storage needs more than 8 hours; cooling uniformity, high quality. In a vacuum from fruits and vegetables, edible bacteria surface to core caused by moisture evaporation, uniform cooling temperature, not cold heat; even before cooling into the vacuum box for each part of the material temperature different, vacuum cooling, the temperature of each part of the uniform; the vacuum pre cooling, fruit and vegetable freshness, color, taste good, storage time longer;