The pressurized-water chamber design adopts rectangular section and half-spiral vortex chamber.
压水室设计采用矩形断面、半螺旋形涡室。
The solitary wave theory of the weakly nonlinear, non-axisymmetric disturbances is used to model the spiral vortex breakdown.
本文使用弱非线性、非轴对称扰功波的孤立波模型模拟螺旋型涡破裂。
Around the dark core of an optical vortex, the energy flow carried by the light beam is like a spiral staircase, flowing in a clockwise or counterclockwise direction.
绕着光涡旋的黑暗中心，光束携带的能量流就像螺旋梯，沿着顺时针或者逆时针方向流动。
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