Based on the similarity principle, the casting process of piston rings has been investigated by hydraulic simulation in the paper, and the method of reducing rejected products has been searched.
本文根据相似原理，介绍了利用水力模拟的方法，研究活塞环的浇注过程，寻找降低废品的途径。
2
According to hydraulics, sediment dynamics and similarity theory, a hydraulic model for a horizontal-flow sand basin was designed.
运用水力学、泥沙运动力学及相似理论，对平流式沉沙池进行了浑水水力模型试验研究。
3
The model scale and the ratio of prototype to model for various hydraulic elements are selected in the light of theory of unsteady flow similarity for hydraulic models.