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Popov, A.A. T T T diagrams of carburized and non-carburized 0.17%C, 1.55 Cr, 4 Ni (0.9W) steels. Met Sci Heat Treat 2, 309–310 (1960). https://doi.org/10.1007/BF00649679
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DOI: https://doi.org/10.1007/BF00649679