channel iron

例句：

1. 1. The channel iron is used to protect electrical cables from damage.
   通道铁用于保护电线免受损坏。
2. 2.The construction crew installed the channel iron before starting work on the new building.
   施工队在开始新建筑工作之前安装了通道铁。
3. 3.The channel iron was designed to prevent water from seeping into the basement during heavy rain.
   通道铁的设计是为了在大雨期间防止水渗入地下室。