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。
Factors influencing the tensile strength of polymerizer head sample were introduced, which included the sampling position, sampling direction, sampling quantity and the cross section shape of sample.
介绍了影响聚合釜封头试样拉伸性能的因素：取样部位、取样方向和取样数量及试样的横截面形状。
DESIGN: Random cluster sampling methods and a cross-section survey.
设计：随机整群抽样，横断面调查。
应用推荐