prestressed ground anchors

例句：

1. 1. The beams are prestressed to withstand the weight of the roof.
   这些梁被预应力处理以承受屋顶的重量。
2. 2. The concrete slab is prestressed to improve its strength and durability.
   混凝土板被预应力处理以提高其强度和耐久性。
3. 3.The bolts are prestressed to ensure they will not fail under load.
   螺栓被预应力处理以确保它们在负载下不会失败。