... steel, cross range are spiral griping, make silo more strength, wind resistance, earthquake resistance, and ... crimping, thickens of crimping is five times of silo thickness, good sealing performance, convenient for fumigating and ... : short construction period, for 1,000 tons silo, it takes 5-6 days, and customer can ... it immediately. 4. Nice appearance: top of silo is cone shape, not easy for dust and ...