The prism is white prefabricated concrete with a fluted base able to introduce horizontal light.
棱柱体是白色预制的混凝土，下面一个凹槽底座能够引入水平的光线。
Experiments were performed in horizontal and vertical conduits with diameter of 50 mm respectively, adopting air and water as flow media and a triangular prism as the vortex-forming body.
以空气和水为介质，以三角柱为旋涡发生体，在内径为50 mm的水平管和垂直上升管中分别进行实验，分析雷诺数和体积含气率对气液两相流涡街稳定性的影响。
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