... 1.New patent, 2.internal circulation of hot air 3.temperatire up to 180C Hot-air Circulating dryer: More plastic auxiliary equipment please ... ,New patent high-temperature dryer;2,Internal circulation of hot air,dryingtemperature up to 180°C;3,Fast temperature increase, ... 4,Microcomputer touch-type PID control foraccurate temperature control;5,Hot air reclamation to lower plant tempera-ture,at least 50% ...