... In accordance with the aluminium window delicate and gorgeous, High performance adornment , with the main part of thermal-break ... anti-corrosive, skimmed, flame retardant processing,adopted the German high strength glue sticking, make the lumber strength,anti-corrosion, ... -free threshold9.Beautiful shape, elevation effect concise and bright10.High strength and rigidity, durable, opening deft and agile, ...