warm air duct的用法和样例：
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，空气管和空气处理装置比起管道和泵需要更多空间，管道系统很难密封，泄漏很难发觉。 - Inspectors said an air tube inside the model's engine may become disconnected because of substandard heat-resistant parts, which may harm driving safety.
据悉，召回原因是这些轿车发动机空气管的材质耐热性能不足，有可能影响行车安全。
