Factors affecting constant pressure difference control method and advantages and disadvantages of the control plan are analyzed theoretically through pipe system head curve and pump performance curve.

根据管道水力特性曲线与水泵的性能曲线，运用理论分析的方法，对影响末端定压差控制方式的因素和该控制方案的利弊进行了分析。

youdao

The difference between static bottomhole pressure and flowing bottomhole pressure (in psi) at a constant fluid production rate.

在恒定的流体产量下，在井底静压力与井底流动压力之间的压力差值。

youdao

Gas transmission rate: the volume of gas which, under steady conditions, crosses unit area of the sample in unit time under unit pressure difference and at constant temperature.

译文：气体透过率：在一定的温度下，在单位时间内单位压力差下，稳定透过单位面积试样的气体体积。

youdao

Because we did work at constant pressure, and so it's just volume difference times pressure.

因为是在恒压下做功，所以功就等于体积变化乘以压力。

麻省理工公开课 - 热力学与动力学课程节选