marking it clear
标记清楚
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Manual marking with billet is influenced by high temperature, so the marking characters are easy to be written incorrectly and not clear. It is difficult to be done on line.
人工方式标识方坯受到高温辐射的限制，容易造成标识差错及标识不清楚，难以实现在线标识。
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