由于灰尘和其他相关材料沿着内部管道壁，或者由于管道壁腐蚀，气体流过管道的流量剖面改变。

As dirt and other collateral material collect along an interior pipeline wall, or as the pipeline wall corrodes, the flow profile for the gas flow traveling through the pipeline changes.

youdao

准确求取流体的真实流动速度是确定油水各相分层流量及产液剖面测井解释的关键。

Accurately deriving the true liquid flow velocity is the key for determining the stratification flow rate of oil and water and logging interpretation of liquid producing profile.

youdao

分析了真空压力、射频功率、气体组合及其流量和电极温度对刻蚀速率、刻蚀剖面的影响；

The dependence of etching rate and profile on the vacuum pressure, RF pow-er, gas composition and flow rate, and electrode temperature is analyzed.

youdao