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. Then, the tamamen pivot is extended by turning the hex key in https://alexisyipxc.bloggosite.com/32830990/çelik-kapı-Üzerinde-bu-rapor-inceleyin