Trains and Technology: Bridges and tunnels ; SignalsUniversity of Delaware Press, 2003 |
Sommario
Authors Note | 9 |
Introduction | 127 |
HighballClear Track Ahead | 134 |
Copyright | |
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Parole e frasi comuni
American Railroad Journal Association of Engineering ball signal Baltimore and Ohio Block Signaling block system Book of Interlocking braces caisson cantilever cantilever bridge chord clear construction crossing danger disc distant signal electrical Engineering Societies erected falsework feet long ferry Figure fixed signals foot long Franklin Institute girders Herman Haupt Hoosac Hoosac Tunnel horizontal Hudson River inch installed iron bridges Jersey lamp later load lock locomotive March mechanism miles mounted operated passenger patented Pennsylvania Railroad piers pole position Practice in Block rail railroad bridge Railroad Gazette Railroad History Railway road rotated safety Scientific American Supplement semaphore arm semaphore blade semaphore signal shaft shield side Signal Company signal lever signal system structure supported suspension bridge Switch and Signal switch lever switch stand target Thomas Viaduct tion tower Town truss track circuit traffic train trestle truss bridge tunnel tunneling shield Union Switch Viaduct wooden York
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