Product Description Composite grating as known as composite bar grating, composite steel grating, compound steel grating or compound bar grating, is a kind of product composed of the steel gratings with certain spanning capacity and the checkered plates with sealing surface. It may be formed by the steel grating in any types and the checkered steel plates in different thicknesses. However, the bottom plate of the most commonly used steel grating is G323/40/100; the riffled
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