To know the origin of the pivot door we must travel a long way back in time. To ancient Persepolis to be exact. Here, various pivot doors were used, and later found, in the Gate of All Nations. 1- Determine the position of pivot point A on the floor.Use the https://villa-kap-s93692.blogadvize.com/32968207/pivot-kapı-Üzerinde-buzz-söylenti