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| skin hole of rimmed steel ingot (【技】沸腾钢钢锭由于坚壳过薄或有气沟致使蜂窝气泡或皮下气泡在均热炉加热过程中暴露或氧化，造成钢坯表面呈鳞状(俗称海绵面)的一种缺陷。) | |||
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