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GB/T 709-2019 热轧钢板和钢带的尺寸、外形、重量及允许偏差 Dimension, shape, weight and tolerance for hot-roll...2023-05-26

GB/T 702-2017 热轧钢棒尺寸、外形、重量及允许偏差 Hot-rolled steel bars--Dimensions, shape, weight and tolera...2023-05-03