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Supporting structure by transfection, grille combination; Its main features are: comprehensive opening rate of up to 58% or more, and able to adapt to the 1.5-2m / s the high gas velocity requirements, the product is easy to manufacture, low cost, for the oldplant transformation as long as some minor changes, will be able to meet the design requirements, maintenance of the supporting structure, and very easy to replace. Our company can produce Al₂O₃ content ≤ 75%, width ≥ 40, ≤ 260 height, length ≤ 2500 a variety of dyeing, according to user requirements, a variety of production width and length ≤ 220 grille.