Primary battery for track circuits and operation of plant using semaphore signals equipped with electric lights.
Automatic interlocking replaces mechanical plant at crossing
Ry Signalling
Railway Signaling ; 26 , n 2
1933
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Automatic interlocking replaces crossing gates
Engineering Index Backfile | 1937
Automatic interlocking replaces mechanical plant
Engineering Index Backfile | 1932
Automatic plant replaces mechanical interlocking
Engineering Index Backfile | 1937
Automatic interlocking replaces gates at crossing
Engineering Index Backfile | 1933
Automatic interlocking replaces mechanical
Engineering Index Backfile | 1936