pick up stacker

例句：

1. 1. The pick up stacker is used to collect and sort items from the floor.
   拾起器用于收集和分类地面上的物品。
2. 2. The machine has a large capacity, capable of picking up stackers weighing up to 500 pounds.
   这台机器容量大，能够捡起重达500磅的堆垛器。
3. 3. The pick up stacker was designed to make the process of sorting and collecting items more efficient.
   拾起器的设计目的是为了使分拣和收集物品的过程更加高效。