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  1. 级配 - 百度百科

  2. 土的级配特征与连续配方程研究-Study on soil gradation

  3. Gradation equation of coarse-grained soil and its applicability

  4. 基于搜索分析深度学习网络 (SaNet)的粗粒土级配识别

  5. Effect of Aggregate Gradation on the Strength of C60 Concrete