SWOBODA Michal - Protective devices on stations and railroad lines. Warsaw-Krakow 1920. books. J. Czernecki. 8, p. 50, [1]. broch.
Good condition. Ex. uncut. According to the author, a pioneering manual for securing railroad traffic. Includes, among others: Fixed Signals, Wireways, Warning Rails, Siemens Inductor, Block Stake Apparatus, Switching Notification Guards, Insulated Rails, Track Barriers, Derailers, Pursued Barriers.
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