Through solving the blood flow equations for local vessel expansion region, the analytical expressions of blood flow velocity, pressure and wall shear stress were then obtained.

接着，通过求解局部扩张血管段内的血液流动方程，导得血液流速、压力和血管壁切应力的分析表达式。

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The SPRD will automatically open as the air pressure in the duct system increases, in order to prevent the reduction of air flow and excessive noise and velocity through the duct system.

当管道系统空气压力增加时，SPRD会自动开启，以防止管道系统中空气流动的减少和过度噪音和速度。

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Stability of regulated pressure is maintained under varying flow conditions through the use of an aspirator tube which adjusts the supply valve in accordance with the flow velocity.

受管制的压力下保持稳定是通过不同的抽气管，可以调整与流速按照使用流量阀供应条件。

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