riser-and-stack

例句：

1. 1. The stacker is used to stack and sort materials efficiently.
   堆叠机用于高效地堆叠和分类材料。
2. 2.The stacker has a simple design that makes it easy to use.
   堆叠机的简单设计使得使用起来非常方便。
3. 3.The stacker can be customized to meet specific needs of different industries.
   堆叠机可以根据不同行业的具体需求进行定制。