... tunnel oven. Hot Air Circulation Drying Oven, Electrothermal Drying Machine, Hot Air Circulation Drying Equipment, Hot Air Circulation Drying Machine, ... hot air circulation oven is a tray mode intermittent drying equipment that is high in utility, applicable for material dehumidifying ... materials. It is a universal type drying equipment. 6. The air inlet port can be added with primary efficiency ...