Structured packing has two kinds of sheet and mesh. The sheet is called corrugated plate, which can be made of ceramic, plastic and metal materials, and the appropriate material is selected according to the process requirements and the corrosiveness of the material. The corrugated sheet of the corrugated wire mesh packing is made of metal wire mesh, so it belongs to the mesh packing. In recent years, metal orifice plate corrugated packing and metal calendered orifice plate corrugated packing have appeared.