File:One-Wire Block Telegraph Instrument.png
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Summary
editDescriptionOne-Wire Block Telegraph Instrument.png |
English: Fig. 15. One-Wire Block Telegraph Instrument. |
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Source | The Working and Management of an English Railway p. 91 | |||||
Author | not stated | |||||
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editTransferred from en.wikisource to Commons using For the Common Good.
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23:26, 4 May 2015 | 843 × 1,065 (187,456 bytes) | s:en:HesperianBot (talk | contribs) | {{raw page scan | page = The Working and Management of an English Railway.djvu/105 | source = http://archive.org/details/cu31924032485058}} |
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current | 09:46, 2 August 2015 | 843 × 1,065 (183 KB) | Billinghurst (talk | contribs) | Transferred from en.wikisource: see original upload log above |
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Horizontal resolution | 28.35 dpc |
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Vertical resolution | 28.35 dpc |
File change date and time | 02:51, 27 April 2015 |