单项选择题
A.1%-10% B.5%-10% C.15% D.10%
A.50%-60% B.40%-70% C.70%-80% D.60%-70%
A.hmin=3.58DfK/E B.hmin=3.58Df/EK C.hmin=3.58RfK/E D.hmin=3.58RfK/EK
A.变形速度 B.变形量 C.变形温度 D.轧制时间
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