... ,metallurgy industry,machinery industry,shipbuilding, harbor,oceanographic engineering,building,paper mills,cement plant,medicine,spinning and weaving,foodstuff ... to make platform,floor,walkway,stair treads,trestle,fending,drainage trench cover,pit cover,suspended ceiling,ventilates and ... projects and environmental projects. 35)HOt!stainless steel drainage grates/galvanized steel grating(factory)