Doors and windows that meet people's home life should be reflected in the following aspects:

warm in winter and cool in summer, good in energy saving and heat preservation; frame is firm, no fear of typhoon; no leakage in rain; when business trips come back, furniture is no longer a layer of "grey"; Sound insulation and noise reduction, creating a quiet and comfortable home environment.

http://www.hugealu.com/good-do....or-window-comfortabl

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