Disadvantages which may arise from use of block instruments having only two indications are revealed in report, issued on June 27, of Colonel Mount on collision of February 17 at Rutherglen on main line, Northern Division of London Midland and Scottish Railway.
The disadvantages of two-position block instruments
Ry Engr
Railway Engineer ; 51 , n 608
1930
2 Figs.
Article (Journal)
English
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