| 摘要 |
A staircase, in particular of what is known as the spiral staircase type, which is constructed around a central, supporting construction part in the form of a bar-like element 2, the bar-like element consisting of a pipe for the transport of a fire-extinguishing medium. The lower part of the pipe 2 is provided with a connection piece 3 for a fire hose for supplying fire-extinguishing medium, and the pipe 2 is, at desired places over the remainder of its length, provided with connection pieces 4 for connection to fire hoses for removal of fire- extinguishing medium. <IMAGE> |
