![File:Sentinel boiler, inner shell with spiral watertubes.jpg](Https://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Sentinel_boiler%2C_inner_shell_with_spiral_watertubes.jpg/449px-Sentinel_boiler%2C_inner_shell_with_spiral_watertubes.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 23:07, 10 January 2012 | ![]() | 2,097 × 2,802 (1.07 MB) | Andy Dingley | == Summary == {{Information |Description=Sentinel boiler, inner firebox shell. Later pattern, with a corrugated shell and the water-tubes arranged in a spiral. |Source={{own}} |Date=2011-12-11 |Author=Andy Dingley |Permission={{self |
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