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Description:Utilizes advanced TRANSAC-BRIDGE technology, is environmentally friendly, and economizes energy use. Conquers the common problems in aluminum alloy shapes for heat insulation and sound insulation. It has the following characteristics: high intensity, high-grade airproof, high-grade waterproof properties. Not only luxuriously sculptured, but also has advanced technology as its advantage. Its entad-opening and entad-closed design is national patented. It not only ups the demand for modern house ornaments, but also has the function of heat preservation, economizing energy, heat insulation and sound insulation. These are due to it obstructing iciness in winter and preventing outflow of cooled air from air conditioning in summer. It is beneficial to achieving individuality in decorating your house by allowing free assembly of windows and doors, with various series and all the colors of the rainbow available.