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DK255579A
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Heat exchange
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Process for preventing cloudiness in refined lubricating oils
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Improvements in and relating to the treatment of electric apparatus
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Method of heating the charge in high frequency furnaces
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Process for the treatment of molten magnesium and magnesium alloys
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Method of producing pure zirconium halides
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Improvments in the production of alloys of high zirconium content
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Process for cleaning zirconium tetrahalides
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Process for the production of magnesium alloys containing zirconium
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Process for the treatment of malted magnesium and magnesium alloys
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Heating device in high frequency induction ovens
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Process of refining hydrocarbons
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Process of catalytic cracking of petroleum hydrocarbons
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Process for the pretreatment of road surfaces to apply a protective layer of bituminous materials
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Arrangement of electrodes in electric rotary ovens
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Apparatus for electrically treating material in rotary furnaces
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Process for the production of bituminous covering compounds
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Process for purifying iron from sulphur
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Method of purifying iron from sulphur
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Method of reducing ore
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