aggregate-to-cementratio是什么意思

用法例句

According to the changes of sediment grain size and the relationship between the allocation ratio of check dam and sediment reduction ratio,the effect of check dam on retaining coarse sediment and flushing fine sediment is analyze.

通过分析实施淤地坝等水土保持措施前后泥沙粒径的变化、淤地坝配置比例与减沙比例关系的变化后认为:淤地坝是快速减少入黄粗泥沙的首选工程措施和第一道防线,具有明显的“拦粗排细”功能。