Trapezoidal roofing roll forming machine produce roofing, wall panels and door panels for building appliances and transportation. It has many advantages such as easy installation, short construction period, beautiful appearance, light weight but high stre
Paraformaldehyde manufacturing process introduction For many years, China's formaldehyde industry has made great strides in terms of production scale, output, quality and technology. In many ways it has approached or reached the international advanced
The product description: Diamond composite sheet (PDC) is under the condition of high temperature, the artificial diamond and hard alloy prepared special super hard material, it not only has the advantages of high hardness, wear resistance of diamond hard