若想知道压力，则需要用流体力学的知识对出口阻力精确的计算。
If you want to know the pressure, you need to export the knowledge of fluid mechanics resistance calculations.
首先，出口受到很大阻力。
在这种状况下，必须降低泵的转速，加大电机的功率，加大进出口的管径来减少介质的流动阻力。
Under this situation, we must reduce the speed of pump, increase the power of the motor, increase the import and export of pipe diameter to reduce the flow resistance of the medium.
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