... cold storage, which includes three types, i. E., DL, DDand DJ. It owns the advantages of compactness, ... classified in accordance with the cold storage temperature. DL type of high temperature, fin space 4.5mm, ... is applicable for cold storage above 0 ºC, keeping fresh food such as vegetables, fruits and ... space 6.0mm, for cold storage around -18 ºC, keeping food such as meat and aquatic products; DJ ...