... °c.Goods conveyed situation: ρ<1.67 t/m3 powder, grainy, small block, bags, etc. Such as coal, gravel, sand, cement, ... steel troughing idler rollers, rubber rollers, roller frame, belt conveyor machinery and spare parts, roller support etc design and production. All ... of our products have one year guarantee for free change and repair. Expolsion-proof belt conveyor machinery for coal and mining use