hog-back girder

例句：

1. 1. The construction of the bridge required the use of a hog-back girder.
   建造这座桥需要使用牛腿梁。
2. 2. The engineer designed the structure with the help of a hog-back girder.
   工程师在牛腿梁的帮助下设计了这座结构。
3. 3. Due to its strength and stability, the hog-back girder is often used in heavy-duty construction projects.
   由于其强度和稳定性，牛腿梁常用于重型建设项目。