向竞争挑战，向压力挑战，更要向自己挑战时间就是一切。
Challenge competition, challenge the pressure, the more to challenge their timing is everything.
通过建立N - S方程，提出了旋流器的切向速度以及压力的计算方法。
Through establish N-S equation, a new way of calculate clipping velocity and pressure of hydrocyclone are designed.
结果表明，煤的含水量与所受的正压力对煤切向阻力的影响有明显的交互作用。
Results show that there is obvious interaction between water content of coal and normal pressure when there is affecting tangential resistance.
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