... materials.4. the machine is low noisy, smooth operated, temperature auto controlled and easy for maintenance.5. widely applied. Suitable ... drug, prepared herbal medicine of CTM, plaster, powder, particle, drinking agent, pill, packing bottle, pigment, dyestuff, de-watering vegetable, dried ... , plastics, resin, electric component, baking varnish and etc. high temperature circulating hot air oven