A door is a movable element that is installed in the opening of a wall or partition and serves to close the passage. Doors can be made of various materials, such as wood, metal, glass, plastic, etc. They can have different sizes, shapes and designs, depending on their purpose and the style of the room. Doors can be single-leaf or double-leaf, sliding or swing, and can also be equipped with various mechanisms for opening and closing, such as handles, locks, hinges, etc. Doors play an important...