warm air duct的用法和樣例：
例句
- However, air ducts and air-handling equipment require more space than pipes and pumps, ductwork is hard to seal, and leaks are difficult to detect.
然而，空氣管和空氣處理裝置比起管道和泵需要更多空間，管道系統很難密封，泄漏很難發(fā)覺(jué)。 - Inspectors said an air tube inside the model's engine may become disconnected because of substandard heat-resistant parts, which may harm driving safety.
據悉，召回原因是這些轎車(chē)發(fā)動(dòng)機空氣管的材質(zhì)耐熱性能不足，有可能影響行車(chē)安全。
