Jingzhou supply villa aluminum factory aluminum security windows wind up windows, preferred evergreen tree, a professional manufacturer of quality assurance price concessions. 1. Internal structure has a unique sliding, bending connection piece, can greatly increase the lighting degree can open the window the maximum width of up to 90%, and the open is not easy to pinch 2. Can be built-in installation, does not affect the appearance of the building, the thieves can not climb. 3. Unique automatic lock, safe, reliable, easy to open. 4. Gate tube open at both ends with grooves between the upper and lower chute frame and form a mutual engagement structure, anti-pull, anti-twist, tamper, no sliding metal friction sound. 5. Plug-frame structure, and excellent tamper resistance.