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。
Its main work includes the Yellow river sediment cross-section tests, river bed surface quality sampling and particle size distribution analysis and so on.
这些问题的提出就使得深海海底表层沉积物的保真取样技术研究非常有必要。
So, all above mentioned makes it necessary to study the truth-preserving sampling technique for the deep-sea surface layer sediments.
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