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Heat Bridge-cut-off Aluminum-alloy Windows is the most advanced aluminium alloy window, and is the fifth new style warm-keeping and widow which follows the iron, plastic and common colorful aluminium alloy window.use Heat-insulation Aluminum-alloy profile and insulating glass with energy-saving, sound-insulation, protection of noise, dust, water function, and European structure imitation beautiful appearance. The heat-transfer coefficient U-value of heat-insulation Aluminum-alloy Windows is ≤3W/K, reducing the heating loss of common window by half and around 30% heating costs. Sound-insulation reaches 160 decibels. Good function of water resist all reaches National A1 standard.