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Description:Wind-resistance and vibration absorbing: the straight materials on the inner frame are of a hollow design and have good effects for resisting wind and absorbing vibrations. The inner and outer frames are flexibly jointed, with triple seals used (one glue strip and two wool strips). These provide excellent air and water tightness, and ensure windows slide freely and silently. The oblique stepped structure and the drain in the downward slide ensure free water discharge without any back-flow. The window's hollow glass structure provides excellent sound- and thermal insulation, and meets state requirements on environmental protection and saving energy. The window is provided with thief-proof, airflow barring, and loose- proof units and unique multi-point locks. Thus, it keeps stable, tight and safe. It has an elegant style, streamlined design and outstanding decorative effect. The corrugated glaze-window may be internally or externally fixed in the same slide. It effectively prevents mosquitoes and flies entering, has excellent tightness and decorative effects, and is especially suitable for mosquito-prone southern regions. The unique design saves materials and costs, reduces the weight and makes fabrication much easier. When tested by the Fujian Architectural Doors, Windows and Curtain Quality Supervision and Inspection Station, "three performances" of the product were assessed as reaching grade A1.