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nature : the spiral rotation promote material and moving conveyor equipment. By slot machines, spiral and drive components. Feed materials I join drive rotary screw driven, right-groove wall friction materials to prevent materials with rotating helical blade was pushed to spiral out unloading materials mouth. Advantages are : (a) structure is simple, compact, small footprint; (2) easy confined; (3) Operation and easy management. Weaknesses : (1) running resistance greater power consumption are large; (2) easy to wear; (3) not too long distance transport. Not applicable to the transportation of hardware and the little friction or bulk powder materials. Filling can be used and mixed materials. The carrier is too thick sticky materials, materials bonded with the spiral so as to lose the power transmission capacity.
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