This type of sliding window, which works like an automobile sliding door, is generally called a tilt-and-slide or parallel-sliding window. It was first developed by German hardware manufacturers using an external slide track combined with an inward-opening casement; it is simple in structure and easy to operate, but its cost has remained very high, and although the external track has a decorative cover, it still affects the overall appearance. Domestic manufacturers followed this principle and developed parallel-sliding windows with the track prefabricated inside the profile, called drift windows; although this solved the appearance problem, building the track into the profile greatly increased the difficulty of making the window, making mass production basically impossible. The hardware for such built-in tracks is also costly, and the built-in design gives the moving part poor load-bearing capacity and a very high repair rate, which further raised the cost of the whole window. With imperfect technology and persistently high costs, this drift window system has never been able to be promoted widely.

Leveraging the advantages of the integrated aluminum alloy window system, we combined a built-in slide track with the sliding principle of traditional sliding windows and launched a high-performance parallel-sliding window that seals tightly when closed and slides smoothly when open. It opens and closes comfortably and slides flexibly. The GM-CTL high-performance parallel-sliding window inherits and brings out the close-and-lock characteristic derived from the automobile sliding door principle, selectively avoids the respective defects of external and built-in slide tracks, and takes a different path to fully express the high performance of parallel-sliding windows, providing public building areas with excellent airtightness and a sliding window solution.