It is a kind of external construction material of high strength, which was only applied to the aeronautic industry in the past. The surface layer of such plate is aluinum alloy sheet, while the central layer is the honeycombed structure made of aluminum foil, which has excellent rigidity and is the best one of the metallic wall material available today. It has been widely used in the decoration of modern architecture, train, automoble and ship manufacturing industries.
It is a kind of external construction material of high strength, which was only applied to the aeron