girder steel

• 钢梁,工字钢

girder steel的用法和样例：

例句

1. A steel girder may warp in a fire.
   钢梁遇火会变弯。
2. When the flood waters weakened the bridge, it was shored up with steel beams and sang bags until it could be rebuilt.
   洪水冲坏了桥梁，人们用钢梁，沙包加固，暂时维持以待重建。