... conveyer is a rectangular cross section in a closed shell, by means of a moving end of the ... It is more flexible in art processing.Because the shell is closed in the transportation of materials,it ... products are widely used in metallurgy, building materials, electricity, chemicals, cement, ports, ports, coal, mining, grain, food, feed, ... ≤150≤150≤150≤150≤150 Scraper Conveyor for cement production line