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alternating double/single-roll
met. 双环流/单环流交替变化 (【技】指由于拉坯速度、喷吹气体、浸人式水口侧孔倾角等因素的变化所引起的结晶器内钢水流动模式双/单环流的交替转变。)
alternating double/single-roll
: 3 phrases in 1 subject
Metallurgy3