top unloader

例句：

1. 1. The top unloader was used to load the goods onto the truck.
   顶载机被用来将货物装载到卡车上。
2. 2. The top unloader was responsible for lifting heavy loads.
   顶载机负责搬运重物。
3. 3. The top unloader is an essential tool in the construction industry.
   顶载机是建筑行业中不可或缺的工具。