side frame bottom oblique chord

例句：

1. 1.The side frame bottom oblique chord is crucial for the stability of the structure.
   侧框架底部斜弦对于结构的稳定性至关重要。
2. 2. The engineer designed the side frame bottom oblique chord to ensure maximum strength and durability.
   工程师设计了侧框架底部斜弦，以确保最大的强度和耐用性。
3. 3. The construction of the bridge involved the use of side frame bottom oblique chords to support the weight of the vehicle.
   建造桥梁时使用了侧框架底部斜弦来支撑车辆的重量。