Vladimir Vasilievich Efremkin

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Sverdlovsk, SU

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for continuous vacuum-refining of metals
- Patent number 4,027,861
- Issue date Jun 7, 1977
- Vladimir Semenovich Cherednichenko
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...