The complete cycle for Elphidium crispum takes two years in the shallower marine regions, although it may be delayed at deeper stations.

The single-vault deep underground station is a type of subway station.

The bodies were dumped into a deep dry well near the police station.

The pylon station was the earliest type of deep underground station.

The two deep stations both consist of pylon trivaults, which are separated by arcades leading to the station platforms.

Although this is an extremely deep station, the Bennett Avenue entrance is actually at a lower elevation than the platforms, so the ramp slopes down.

Four of the deep stations are single vaults built on Leningrad technology and one is a Pylon.

It is the second deep station among the station of the first line as being located at a place crossing Geumho River.

The city's uneven landscape, as well as its layout with a very dense city centre, prompted to combine deep and shallow stations.

This deep station, 120 feet below the surface, has four elevators, and a bridge connecting the two side platforms.