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