ironing board cover price_tischdecken mit spannbettlaken für picknicktische

Steel structure warehouse exposed to the outside, the corrosion resistance of ordinary steel is not strong, especially in the external environment with large humidity and corrosive media, steel structure is easy to rust corrosion, greatly weakening the bearing capacity of components. A large number of statistics show that the collapse of steel roof truss caused by corrosion and lack of maintenance accounts for a large proportion of the total.