precast foam concrete

例句：

1. 1.The precast concrete bridge is being constructed on the riverbank.
   在河岸上正在建造一座预制混凝土桥。
2. 2. The precast concrete blocks are easy to install and maintain.
   预制混凝土块易于安装和维护。
3. 3. The precast concrete structure is strong and durable, making it ideal for construction projects.
   预制混凝土结构坚固耐用，是建筑项目的理想选择。