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Vertical sliding double pane glazed soundproof double hung aluminum windows aluminum up down sliding sash window on China WDMA

Vertical sliding double pane glazed soundproof double hung aluminum windows   Structural features: 1. Adopt double guarded design, to increase the wind resistance index. 2. Use the open wood technology for splicing frame, and use imported waterproof glue before splicing, the colloid is fully extruded when we fasten screw, so the waterproof...
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China Windows and Doors Manufacturers Association

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