译文：氧气透过量(PO2)：氧气透过率与薄膜两侧的氧气分压差的比值。
Oxygen Permeance (PO2) : the ratio of the O2GTR to the difference between the partial pressure of O2 on the two sides of the film.
进一步地，我们采用二分法与相平面分析结合的方法计算压差方程的数值解。
Furthermore, we compute the Riemann solution by using a bisection method combined with the phase-plane analysis.
本课题第一部分的任务是设计一种差压式流量计的差压发生器。
In this thesis, the first part is to design a differential pressure (DP) flowmeter.
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