back slab

例句：

1. 1. The engineer carefully removed the back slab to access the electrical components.
   工程师小心翼翼地移除了后板以访问电气组件。
2. 2. The car's back slab was designed to provide additional support for the rear seats.
   汽车的后板设计为提供额外的支持给后座。
3. 3. The construction company used a special back slab to reinforce the foundation of the building.
   建筑公司使用了一种特殊的后板来加固建筑物的基础。