... and durability style wngineered for school ,house ,factory Aluminium windows & doors ,curtain wall ,roller shutter,partition ,fixed ... way.Adjustable modelling and various surface treatment, such as Anodized,Electrophoresis,Powder coating,Fluorine-carbon coating,Imitated wooden ... angle connector, convenient assembly. Opening way diverse,such as Casement,Tilt-turn,Single/double hung,Sliding,Folding, ...