不一会儿，漩涡从水面扩展到槽底，带动了整个水槽里的水。
In a minute the whirl extends from surface to drain, animating the whole basin.
试验表明：冰盖下泥沙起动流速与冰盖及槽底糙率的相对比值有关。
The experiment results show that the threshold velocity is affected by the ratio of roughness coefficient of ice cover and bed.
槽底为夹层，内置水冷循环系统，恒温性能比一般气冷系统好，提高了颗粒质量。
The bottom is the mezzanine with built-in water circulation system which has better thermostatic performance than air cooling system is good, improved pellet quality.
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