screw conveyor 1.simple stucture,easy installed 2.big transportation capacity 3.ISO9001,3C 4.OEM is acceptable screw conveyor The screw conveyor is suitable for transporting all kinds of powder granular matrials and blocks.The screw conveyor is suitable for transporting all kinds of powder granular matrials and blocks, such as coal, gravel, lump coal and sand, cement, cereal, etc, not suitable ...