Bifold doors, also known bey folding or concertina doors, are folded in sections or panels, usually in two sections (although some with more sections are still called bi-folds). One of their other names is the concertina door because it resembles the instrument. Esadoor offers solutions in its own production facilities https://pivotdoor83715.digitollblog.com/29530007/en-kuralları-of-villa-çelik-kapı