gas exhaust piping

例句：

1. 1. The factory has to install gas exhaust piping to comply with environmental regulations.
   工厂必须安装废气排放管道以符合环保法规。
2. 2. The engineer designed the gas exhaust piping for the new plant.
   工程师为新工厂设计了废气排放管道。
3. 3.The gas exhaust piping is crucial for maintaining air quality in the city.
   废气排放管道对于维护城市空气质量至关重要。