In a special circulating system with high velocity flow, boundary shear stresses in clear water flow, aerated flow and sediment laden flow are measured.
在高速水流循环系统中，用自行研制的剪切力传感器分别量测了清水、掺气水流及挟沙水流壁面上的剪切力；
The pressure roll is usually cooled both by internal circulating high velocity water and by placing a water-cooled aluminum roll against the trailing edge of the pressure roll as a heat sink.
压力辊轴的冷却通常是通过两个条件：使用内部高速循坏的水流速，以及放置一个对着压力辊轴的尾部作为散热器的水冷却铝辊轴。
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