Sniffing is regulated by the soft palate, a flap of tissue in the back of the throat that directs the flow of air through the mouth and nose.
闻嗅由软腭控制，那是位于喉咙后面的组织，通过不停来回拍动来导向经过嘴和鼻子的气流。
The back of the grid material with high permeability, three-dimensional two-channel design, air flow, moisture and heat away.
背部采用高透气性网格材料，三维立体双通道设计，空气导流，带走湿气和闷热。
In this paper, we present a new type of hybrid arc quenching system, which controls the metal vapor and back flow of the hot air in splitters arc quenching chamber.
本文研究了一种将窄缝与栅片配合应用于限流断路器的新型混合式灭弧系统。控制了栅片间金属短弧的金属蒸气喷流，同时削弱灭弧室中热气体的回流。
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