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Fixed window profiles are used for windows that do not need to be opened. They are often used in combination with other types of windows to provide natural light and aesthetic appeal.

Extrusion: The billet is heated and placed onto an extrusion press, which passes it through a die and goes through several processes to ensure it is straight, strong, and of the required quality. The extrusion process includes an automatic production line composed of ingot heating, extrusion, cooling, straightening, cutting, and other processes .