References
N. T. Deordiev and Yu. F. Filimonov, “Study of the process of multistage reduction in rigid dies”Kuzn.-Shtamp Proizv., No 9 (1963).
Yu. F. Filimonov, “Experience in cold extrusion of steel parts,”Kuzn.-Shtamp. Proizv., No. 12 (1960).
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Translated from Metallurg, No. 5, pp. 16–17, May, 1996
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Troitskii, V.P., Akaro, I.L., Smirnov, O.M. et al. Production of hollows by piercing with subsequent reduction in annular dies. Metallurgist 40, 84–85 (1996). https://doi.org/10.1007/BF02346411
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DOI: https://doi.org/10.1007/BF02346411