... cooler is classified in accordance with the cold storage temperature. DL type of high temperature, fin space 4.5mm, is applicable for cold ... fresh food such as vegetables, fruits and eggs; DD type of moderate temperature, fin space 6.0mm, for cold storage around -18 ... , keeping food such as meat and aquatic products; DJ type of low temperature, fin space 9.0mm, for -2ºCcold storage, used ...