racking pile

例句：

1. 1. The constructioncrew is busy erecting the rackingpiles for the new bridge.
   建筑队正在忙着为新桥搭建打桩桩。
2. 2.The engineer used a timber stacker toload the materials onto the racking piles.
   工程师使用木材堆垛机将材料装载到打桩桩上。
3. 3. The racking piles are essential for supporting theweight of the structure during construction.
   打桩桩对于支撑结构在建设期间的重量至关重要。