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| Keywords: Electric Signal Repeater and Light Indicator.png en Fig 16 Electric Signal Repeater and Light Indicator 1889 https //archive org/stream/cu31924032485058 page/n106/mode/1up The Working and Management of an English Railway p 93 not stated PD-old File The Working and Management of an English Railway djvu 107 Original upload log en wikisource ftcg page en wikisource The_Working_and_Management_of_an_English_Railway djvu-107 png wikitable - 23 26 4 May 2015 666 × 624 113 668 bytes HesperianBot s en <nowiki> raw page scan The Working and Management of an English Railway djvu/107 http //archive org/details/cu31924032485058 </nowiki> The Working and Management of an English Railway book Telegraph instruments | ||||
