然而，压力降几乎完全发生在多孔塞中。

However, the pressure drop occurs almost completely in the plug.

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注射管的末端提供有分散装置例如多孔塞或烧结玻璃。

The end of the injection tube is provided with a dispersion device such as a porous plug or fritted glass.

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灌浆方法包括钻孔、卡塞或埋管、配置灌浆器具，然后采用多孔并联灌浆。

The grouting way comprises drilling hole, clamping the plug or burying the pipe, and configuring grouting devices, and grouting by a plurality of holes connected in parallel.

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And I want to make sure everybody figured out that it really was an irreversible expansion.

或者多孔塞的,不可逆的等焓过程。

麻省理工公开课 - 热力学与动力学课程节选

You take a throttle valve, which consists of some sort of porous plug between two cylinders that is insulated. There is insulation here.

有一个节流阀，它由一些多孔的塞子组成,这些多孔塞在两个绝热的汽缸之中,这里是绝热的，底下也是绝热的。

麻省理工公开课 - 热力学与动力学课程节选