Mamandad and Gorif are really the same entrance but in different locations. Satan can begin his journey to the surface in Tunnel 904 (also known as Thunder Route 5) and can decide while travelling which of the two he will emerge from by dialing a 4 digit code on his mobile. This is achieved by a highly complex pattern of timespace-shifting algorhythms. Mamandad was given a facelift in 1701 but in the process lost a lot of its original charm.
Radiation trace: nil