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实验发现,在H形件轧边端过程中,当轧边端压下率(?)_E 或者轧件的轧前边高 H_0与边厚 t_0之比值
The experimental results show that during the rolling process of the H-shaped part, the ratio of the rolling reduction (?) _E or the ratio of the rolling front height H_0 to the edge thickness t_0