Screw Conveyor 1,Reliable Running 2,Easy Maintenance 3,Widely Applicable 4.ISO:9001:2000 Screw ConveyorScrew Conveyor Main Features:1,Reliable Running2,Easy Maintenance3 ... ,Widely Applicable4,Durable Body Usage of Screw Conveyor:this machine is situable for conveying powdery, granular and small ...