Standard specifications covering arrangement of symbols and diagram of proportions for drawing semaphore blades.


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    Title :

    British standard railway signalling symbols. part 1. schematic symbols


    Additional title:

    Brit, Eng. Standards Assn



    Publication date :

    1930


    Size :

    42 pages


    Type of media :

    Standard


    Type of material :

    Print


    Language :

    English