... 4:IS09001 LSY series screw conveyor is a new type of transporting equipment, which uses rotaryscrew vane to push materials ... closed housing in round section.Main characteristics:1.Compact structure, small cross section, light weight!2.Good seal performance, good ... which includes:clay powder, pulverized coal, cement, sand, grain, smallpiece of coal , cobble, and cast iron filings, etc.While it is ...