porous plug

基本解释

The end of the injection tube is provided with a dispersion device such as a porous plug or fritted glass.
注射管的末端提供有分散装置例如多孔塞或烧结玻璃。
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。
The molten iron of stable temperature and composition is obtained und the condition that adopting duplex melting technology and ladle desulphurizing with porous plug process.
采用双联熔炼工艺，多孔塞法炉外脱硫，获得温度和成分稳定的铁液；

OK, so we ended up last time, we talked about Joule-Thomson expansion, which is an irreversible expansion through a nozzle, through a porous plug, constant enthalpy expansion.
上节课，我们讨论了焦耳-汤姆逊，膨胀过程,也就是气体，通过毛细管。
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