steel movable form

例句：

1. 1. The new bridge is made of steel and can withstand heavy loads.
   这座新桥由钢制成，能够承受重载。
2. 2. The steel beams are used to support the roof of the building.
   这些钢梁用来支撑建筑物的屋顶。
3. 3. The steel pipe was bent into a tight spiral shape for reinforcement.
   这个钢管被弯曲成紧密螺旋形状以增强结构。