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Australian Standard aluminium double glazed windows folding glass window ventilation bifold window on China WDMA

Certifications ACOUSTICS TESTED WINDOWS & DOORS Sound or acoustic performance of a window is measured by the weighted sound reduction index or Rw value. Rw values are determined by measuring the reduction in dB achieved where a window is used to insulate against a sound source.The Rw value will increase...
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China Windows and Doors Manufacturers Association

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