There is a general seaward fining of sediment particle size within the latter two regions of the delta.
有一种通用的泥沙粒径蔼净化剂的伊洛瓦底江三角洲的两个地域。
Its main work includes the Yellow river sediment cross-section tests, river bed surface quality sampling and particle size distribution analysis and so on.
其主要工作内容包括黄河河道断面淤积测验，河道表层河床质取样及颗粒级配分析等工作。
The size of a sediment particle alone is usually not sufficient to describe it.
单颗泥沙的粒径通常不足以描述其性质。
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