Parallel Opening hinges are windows that can open or close the window sash parallel to the normal direction of the facade.
Sliding windows/doors use window sashes equipped with pulleys to slide on the track on the window frame. There are two types of sliding windows: left and right, and up and down. Sliding windows have the advantages of not occupying indoor space, beautiful appearance, economical price, and good sealing. They use high-end slide rails and can be opened flexibly with a light push. With large pieces of glass, they can increase indoor lighting and improve the overall appearance of the building. The window sash has a good stress state and is not easy to be damaged, but the ventilation area is subject to certain restrictions.
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