precast aerated concrete

例句：

1. 1. The precast concrete bridge was completed in a week.
   这个预制混凝土桥一周就建成了。
2. 2.The precast concrete blocks are easy to transport and install.
   预制混凝土块易于运输和安装。
3. 3.The precast structure is stronger and more durable than traditional construction methods.
   预制结构比传统建筑方法更坚固耐用。