It is made of metal raw materials by punching, pressing and spraying by mechanical combination mold. It has excellent properties such as high strength, good toughness, bending resistance, aging resistance, flame retardant resistance, high and low temperature resistance, acid and alkali resistance, and strong bending deformation resistance. After special formula and process production, it can be made into various thicknesses and colors according to user needs, with long service life, bright colors are not easy to fade, etc. The comprehensive dust suppression effect is good, superior to similar products at home and abroad