pile lifter

例句：

1. 1. The pile lifter is used to stack and lift heavy objects.
   堆叠器用于堆放和提升重物。
2. 2. The pile lifter was designed to make the job easier for the workers.
   堆叠器的设计是为了使工人的工作更轻松。
3. 3. The pile lifter has a mechanism that allows it to move objects without lifting them up.
   堆叠器有一个机制，可以让它在不抬起物体的情况下移动它们。