1 screw conveyor is equivalent ISO1050-75 2 carrying large capacity, safe and reliable. 3 used widely 4 ISO9001:2000 Summary 1 the LS type screw conveyor are devided to single drive and dual drive forms. 2 LS-type screw machine has been widely used in various departments of the national economy, such as building materials, metallurgy, chemical industry, electric power, coal, machinery, light ...