... roller drier,rotary drying machine Roller Drum drying machine 1.High efficiency 2.good performance. 3. easy operation,l Roller Drying machine, rotating drying machineRoller Drying machine ... , grain, sand, clay and other materials. Roller Drum dryerThe main part of the drum dryer for a with ... to the feeding end by hopper of feeding machine through charging pipe .Feeding pipeline slopping angle should ...