Broken Bridge using aluminum-plastic composite insulation Aluminum doors and windows and insulating glass, imitation Continental structure, pleasing in appearance, with energy conservation, noise, Fangzao, dustproof, waterproof function. Broken Bridge aluminum doors and windows of the thermal conductivity K value for the following 3 W/m2 K, the heat dissipation than ordinary windows and doors reduce by half, reduce heating costs at about 30 percent, amounted to 29 db noise more than watertight, airtight good of all A1 category window of national standards.