post-tentioned prestressed concrete girder

例句：

1. 1. The post-tentioned prestressed concrete girder is a critical component of the bridge's structural integrity.
   预应力混凝土梁是桥梁结构完整性的关键组成部分。
2. 2. The engineer carefully designed the post-tentioned prestressed concrete girder to ensure its strength and durability.
   工程师仔细设计了预应力混凝土梁，以确保其强度和耐用性。
3. 3. The post-tentioned prestressed concrete girder plays a vital role in supporting the weight of the bridge and preventing collapse.
   预应力混凝土梁在支撑桥梁重量并防止坍塌方面起着至关重要的作用。