tube and pipe of aluminium alloy

例句：

1. 1.The engineer designed the new water supply system with a focus on efficiency and durability.
   这位工程师设计了新的供水系统，重点在于效率和耐用性。
2. 2. The pipes in this area are old and need to be replaced.
   这个区域的管道很旧，需要更换。
3. 3.The construction crew was busy installing the new tube and pipe systems.
   施工队忙于安装新的管道和管道系统。