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。
You take a throttle valve, which consists of some sort of porous plug between two cylinders that is insulated. There is insulation here.
本文提出了用阳极氧化法测定阀金属烧结多孔体的表面积。
The present paper Outlines that the surface area of sintered porous metal for valve can be measured by anodic oxidation.
由引黄连接段工程引进的日本粟本铁工所设计、制造的淹没式多孔套筒阀，在国内为首次使用。
The exported relief valve with submerged perforated sleeve designed and manufactured by a Japanese company is used in the connecting section of YRDP for the first time in China.
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