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ступенчатая закалкаstresses
met. tempera differenziale; tempera in due tempi; tempera a gradini; tempera interrotta; tempera scalare
tech. tempra a gradini (I. Havkin); tempra scalare (I. Havkin); tempra progressiva (Rossinka); indurimento rotto; tempra interrotta
ступенчатая закалка: 3 phrases in 2 subjects
Metallurgy2
Technology1