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对连铸钢方坯中内部裂纹的分类、成因进行了系统的研究 ,指出了YB T 4 0 0 2 - 1991标准中的错误与不足 ,提出了修订标准建议。
The classification of the internal cracks in the continuous casting billets and their causes were systematically studied. The errors and deficiencies in the YB T 4 0 0 2 - 1991 standard were pointed out. Some suggestions for the revision of the standards were put forward.