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.

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。

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To the problem of cavitation and shock that appears in the outside circulation piston pump running, the relation-ship between rotor profile and dead volume, flow rate and cavitation were analyzed.

针对外环流活塞泵运转时出现的汽蚀、震动问题，从理论上分析了转子型线与闭死容积、流速变化和发生汽蚀的内在关系；

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

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；

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