air-supply duct的用法和樣例：
例句
- Propeller fans are used to move free air within a room or through channels having low frictional resistance.
螺旋槳式風機通常用於房間內或通過風道時移動自由氣流時，產生微弱的摩擦阻力。 - Then the practicability and effectivity of this method using on the duct design and optimization are verified by experiments.
通過試驗驗證該方法在風道設計優化方面的可行性和有效性。
