pipe laying

例句：

1. 1.The construction company was responsible for the pipe laying work on the new highway.
   建筑公司负责新高速公路的管道铺设工作。
2. 2.The engineers carefully laid down the pipes to ensure they were properly connected.
   工程师们仔细铺设了管道，确保它们连接得当。
3. 3.The pipeline was laid in a straight line, which greatly improved the efficiency of the transportation system.
   管道以直线铺设，大大提高了运输系统的效率。