This type of door (or window) is suitable for places where full insulation of the sash is needed and a turning door or window is not feasible.
The sash slides on a special track, occupying the minimum space outside the door or window for opening and closing.
Given the locks devised on the four sides of this sash’s frame, it provides the fullest insulation among different doors and windows.
In addition to the sliding mode, this sash can also be tilted.
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