Technology structure is simple and the cost is lower. Components are general purpose. Maintenance easy. The ability of convey can satisfy the requirement of common convey. So, it is used wildly in level of declination system. belt width:500,650,800,1000,1200,1400 driver power 1.5-200kw(12 varieties) belt velocity: 0.8,1.0,1.25,1.6,2.0,2.5,3.15,4.0m/s(8 varieties)