... petroleum, chemical, power plant, waste treatment plant, civil engineering projects and environmental projects.1.Material:carbon steel or ... /T 4001.1-2007USA: ANSI/NAAMM(MBG531-88)UK: BS4592-1987Australia: AS1657-1985Galvanized Concrete Serrated Steel Grating ... ,metallurgy industry,machinery industry,shipbuilding, harbor,oceanographic engineering,building,paper mills,cement plant,medicine,spinning and ...