metal raceway

例句：

1. 1. The metal raceway is used to transport heavy materials.
   金属走道用于运输重材料。
2. 2. The construction crew was working on the metal raceway when it collapsed.
   建筑工人在维修金属走道时发生了坍塌。
3. 3. The engineer designed a new metal raceway that could withstand high pressures.
   工程师设计了一种新型的金属走道，可以承受高压。