prestressing mechanism

例句：

1. 1.The engineers developed a prestressing mechanism to strengthen the concrete beams.
   工程师们开发了一种预应力机制来加强混凝土梁。
2. 2. The construction of this bridge required the use of a prestressing mechanism to ensure its stability.
   建造这座桥需要使用一种预应力机制来确保其稳定性。
3. 3. The prestressing mechanism was crucial in preventing the collapse of the building during an earthquake.
   预应力机制在防止建筑物在地震中倒塌方面至关重要。