girder propping

例句：

1. 1. The beams of the roof are securely fastened to the girder propping system.
   屋顶的梁被安全地固定在支撑梁系统上。
2. 2. The engineer used the girder propping technique to reinforce the weak section of the bridge.
   工程师使用支撑梁技术加固了桥梁的薄弱部分。
3. 3. The construction crew was using girder propping to support the weight of the new building.
   施工队正在使用支撑梁来支撑新建筑的重量。