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Способ изготовления сплавов феррованадия на основе алюминотермического самораспространяющегося градиентного восстановления и рафинирования шлаком
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1934-11-27
Manufacture of anhydrous metal chlorides
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Method of making silicon monoxid
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Smelting process
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1999-09-23
Procede de synthese de ceramiques complexes pulverulentes de metaux refractaires
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Process for producing reactions in gases at high temperatures and apparatus for practising the same.
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Smelting of ores
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1918-05-21
Process of producing oxids of nitrogen and apparatus therefor.
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Reduction of metallic ores.
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1952-10-15
Procédé de traitement des minerais de chrome.
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1994-03-22
金属クロムの製造方法
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一种提高铸件蠕化率的球化丝及其制备工艺
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Method of making beryllium fluoride
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1908-08-11
Method of manufacturing metals.
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Process of reducing metallic ores.
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1900-04-24
Process of manufacturing rich ferrochromium.
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Manufacture of iron and steel and their alloys.
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Process of reducing refractory oxids.
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Refining process for producing pure iron
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Process of making nitrogenous compounds.
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1908-11-16
Improvements in or relating to the Manufacture of Aluminium or Aluminium Alloys, and Silicides.