What causes my stomach to make a low continuous noise when I'm hungry?
当我饿的时候，是什么让我的胃发出一种低而连续的声音？
Fan noise is the most primary noise fountain in the continuous wind tunnel.
风扇噪声是连续式风洞最主要的噪声源。
There is no pollution. The operation is reliable, continuous, stable with strong suction, low noise.
叶轮运转不与任何零部件接触，没有污染，工作可靠，吸力强劲、连续工作、噪音低、工作平稳。
There is no pollution. The operation is reliable, continuous, stable with strong suction, low noise.
叶轮运转不与任何零部件接触，没有污染，工作可靠，吸力强劲、连续工作、噪音低、工作平稳。
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