Stratified flow is considered a basic flow in two-phase system.

液液两相流动中，分层流动是一种常见的流态。

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Secondly, the model was transformed into the minimum phase system.

讨论了一类非最小相位系统的输出跟踪问题。

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Secondly, the model was transformed into the minimum phase system.

讨论了一类非最小相位系统的输出跟踪问题。

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