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GB1200667A
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A method of and an apparatus for tapping metals
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ES204599A3
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Procedure and apparatus for the obtaining of metals. (Machine-translation by Google Translate, not legally binding)
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CA508715A
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Process and apparatus for extraction of metals
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CA612531A
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Process for the gasification of liquid fuels
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CA517501A
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Gasification of bituminous materials
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CA501996A
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Process and apparatus for vaporization of fuels
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CA617053A
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Process and apparatus for smelting and reducing powdered or finely divided ores
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CA616153A
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Method and device for carrying out metallurgical processes, particularly air refining processes
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