In case of the turbine is operated departing the optimum condition, the low presure and the vortex band will be established in the draft tube centre by the flow circulation.
水轮机在偏离最优工况运行时，水流的环量会使尾水管中心产生低压并形成涡带。
Tower has two giant holes, the sea at an alarming speed from the two giant holes flow, which rolled up strong spray, a huge vortex, so that this band wave surging waters, the sea fog with activity.
塔上有两个巨洞，海水以惊人的高速从这两个巨洞中流过，从而卷起狂澜，形成巨大旋涡，使这一带水域的浪潮汹涌澎湃，海面雾气腾腾。
The flow wave goes a month, tidewater band the star come.
流波将月去，潮水带星来。
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