... selecting, anti-corrosive, skimmed, flame retardant processing,adopted the German high strength glue sticking, make the lumber strength,anti-corrosion,andweather ... .Barrier-free threshold9.Beautiful shape, elevation effect concise and bright10.High strength and rigidity, durable, opening deft and agile, no ... wooden frame and aluminum frame are connected by nylon card buckle , convenient and concise.