File:EB1911 Telegraph - submarine cable - slack indicator.jpg
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EB1911_Telegraph_-_submarine_cable_-_slack_indicator.jpg (501 × 390 pixels, file size: 26 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:39, 17 February 2016 | 501 × 390 (26 KB) | Library Guy | {{Information |Description ={{en|1=The “slack indicator” of Messrs Siemens Brothers & Co. yields a continuous indication and record of the actual slack paid out. It consists of a long screw spindle, coupled by suitable gearing with the cable dru... |
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