prestressed unit

例句：

1. 1. The prestressed concretebeam is designed to withstand high loads.
   预应力混凝土梁设计用于承受高负载。
2. 2.The prestressed steel bar is usedin the construction of reinforced concrete columns.
   预应力钢筋在混凝土柱的建造中使用。
3. 3.The prestressed concrete beam is acritical component of the bridge's structure.
   预应力混凝土梁是桥梁结构的关键组成部分。