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characteristic: 1. thickness of main profiles have two specifications-2.2mm and 2.0mm, which apply to different customers’ choices.
2. frame profiles have the design of three-chamber structer. both frame and sash have the design of independent draining-chamber.
3. by th use of different jointers, it can make an achievement of transformation among any angles, such as 90 degrees or 180 degrees.
4. design of integrated frame make easier of the manufacture and higer of the output rate.
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