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SARE Company's FRP grating trench covers have a wide range of applications, like the pot-room of chemical plant and smelting plant, chemical processing workshop of power plant, pickling workshop of electroplating factory, battery factory and machinery plant, pharmaceutical factory, printing and dyeing mill and salt mine all have a lot of trenches, and there are always corrosive liquid in the trenches. Traditional trenches use gratings welded from angle steels, flat irons and cast irons, which are not corrosion resistant, and they would be destroyed after a few years even few months. Using FRP gratings can solve the corrosion problem well, and FRP gratings are convenient for the sewage spilling into the ditches, as well as observing the inner trench at any time.