stacker crane

例句：

1. 1. The stacker crane is usedto stack and unstack pallets.
   堆叠起重机用于堆叠和卸载托盘。
2. 2.The stacker crane has a largecapacity and can handle heavy loads.
   堆叠起重机容量大，能处理重负载。
3. 3.The stacker crane is an essentialtool for warehouse operations.
   堆叠起重机是仓库操作中不可或缺的工具。