... : Rotary dryer, rotary drier, dryer, drier, wet material rotary dryer, rotary drying machine, sand dryer, sawdust ... supporting device and sealing ring.3. Can I use the coal or gas as the heating source?Yea ... , you can use coal, gas, electricity, oil and wind power ... gear, outlet part, reduce box, motor , heated air duct, inlet month and furnace body and other structure. 2 ...