通过对级配进行比较分析，提出结构层关键筛孔施工控制指标。

Compare gradation of deferent position, then take construction guideposts of structure level.

youdao

通过对级配进行比较分析，提出结构层关键筛孔施工控制指标。

Compare gradation of deferent position, then take construction guideposts of structure level.

youdao