one-step cross beam

例句：

1. 1.The engineer designed a one-step cross beam to support the weight of the building.
   工程师设计了一个单步过梁来支撑建筑物的重量。
2. 2. The construction crew used a one-step cross beam to reinforce the foundation.
   施工队使用一个单步过梁来加固地基。
3. 3. The bridge was constructed using a one-step cross beam, which made it more stable.
   这座桥使用了单步过梁建造，这使得它更加稳定。