China High Output Cement Powder Screw Conveyor/Cement .
China High Output Cement Powder Screw Conveyor/Cement Inclined Spiral Screw . of powder, particles and small lumps, such as cement, sand, gravel, coal, etc. . good sealing performance, high conveying efficiency, flexible process layout, . coal powder, cement, gravel, grain, small block coal, pebbles and iron scrap.