... cracking, no-discoloration,no deterioration, and no oxidation, thorough drying, after drying and rehydration, less loss of nutrients, ... circulating heating or cooling drying,suitable for inflammable and explosive materials, poisonous material,Pungent odor of ... workshop & situation : 2012 tobacco drying machine Air to air,Air source heat pump dryer,drying machine heat pump dryer,Heat recovery dryer