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Translated from Metallurg, No. 12, pp. 29–32, December, 1972.
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Kriegel, G., Sviridov, V. Friendship knows no national boundaries. Metallurgist 16, 849–852 (1972). https://doi.org/10.1007/BF00734499
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DOI: https://doi.org/10.1007/BF00734499