parallel chord truss

例句：

1. 1.The engineer designed the bridge to be both strong and flexible, using a combination of parallel chord trusses and steel cables.
   工程师设计这座桥既坚固又灵活，采用了平行弦桁架和钢缆的组合。
2. 2. The new building is constructed using high-strength steel, with its main structure supported by parallel chord truss systems.
   这座新建筑使用了高强度钢材建造，其主体结构由平行弦桁架系统支撑。
3. 3. The structural integrity of the bridge was tested under various load conditions, including moments due to windand traffic loads, demonstrating the effectiveness of the parallel chord truss design in resisting these forces.
   桥梁的结构性完整性在各种荷载条件下进行了测试，包括风力和交通荷载产生的弯矩，这证明了平行弦桁架设计在抵抗这些力方面的效果。