precast hole

例句：

1. 1. The construction crew was able to finish the precast concrete bridge before the deadline.
   施工队在截止日期前完成了预制混凝土桥梁的建设。
2. 2. The precast concrete blocks were used for the foundation of the new building.
   预制混凝土块被用于新建筑的基础建设。
3. 3. The precast sections of the bridge were assembled in a factory before being transported to the construction site.
   桥梁的预制部分在工厂组装好后，再被运往施工现场。