Safety valve gear. 21 Apr. 1862
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb216-d/dnai/d/dnai/s/11/49
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- ReferenceGB 216 D/D NAI/S/11/49
- Dates of Creation21 Apr. 1862
- Language of MaterialEnglish
- Physical Description1 plan