Sandwich panel is 1 × 304/2b stainless steel plate as surface material, self-extinguishing polystyrene, rock wool, polyurethane, paper honeycomb as the core material, heat-curing adhesive heat pressure molding machine in a continuous and complex into the ultra-light building panels. Products used: purification plant ceilingmotorized curtains motorized curtain motorized curtains motorized curtain motorized curtains motorized curtain motorized curtains automatic curtain automatic curtains curtain motor automatic curtain automatic curtains deep sea fish oil deep sea fish oil capsule Vitamin B, enclosure and so on.