| http://www.w3.org/ns/prov#value | - To achieve this, the subject of the present invention is a method of blowing oxidizing gases, particularly pure oxygen, to refine metals,...http://www.google.com/patents/US4328031?utm_source=gb-gplus-sharePatent US4328031 - Concurrent; minimization of oxygen flow; pig iron; steelsAdvanced Patent SearchPublication numberUS4328031 APublication typeGrantApplication numberUS 06/213,758Publication date
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