Grant of letters patent (including a great seal) issued to Edwin William Thomas and Edward Nightscales for an improved self acting steam water lift and injector.
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- http://vocabularies.unesco.org/thesaurus/concept9750
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Hierarchical terms
Renewable energy sources
Renewable energy sources
Equivalent terms
Renewable energy sources
- UF Alternative energy sources
- UF Source d'énergie alternative
- UF Fuente de energía alternativa