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US2337551A
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Process of producing gas mixtures for synthetic purposes
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US2156851A
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Production of heavy water
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GB462191A
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Improvements in or relating to a process for the production of water enriched with heavy water
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US1884993A
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Production of metallic magnesium
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GB381934A
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Improvements in processes for the manufacture of filaments for use as cathodes in thermionic valves
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GB186589A
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A process and apparatus for the extraction of zinc from zinkiferous materials
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GB205176A
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A process for the electrolytic extraction of zinc from ores and the like
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US1398856A
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Method of fractionate distillation
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