... series air cooler is a kind of cooling equipment suitable for cold storage, which includes three types, i. E., DL, DDand DJ. It ... type of high temperature, fin space 4.5mm, is applicable for cold storage above 0 ºC, keeping fresh food such as vegetables, fruits ... eggs; DD type of moderate temperature, fin space 6.0mm, for cold storage around -18 ºC, keeping food such as meat and aquatic ...