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(fēng)機通常用于房間內或通過(guò)風(fēng)道時(shí)移動(dòng)自由氣流時(shí)，產(chǎn)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(guò)試驗驗證該方法在風(fēng)道設計優(yōu)化方面的可行性和有效性。
