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Principle diagram of IRAHAD dryer. 1. exhaust port, 2. intake port, 3. air velocity adjustment knob, 4. temperature control touch panel, 5. temperature transducer, 6. centrifugal fan, 7. air nozzle, 8. infrared heating tube, 9. drying chamber, 10. mesh drying tray support bracket, and 11. door. Reprinted from ref. [25].
