production riser

例句：

1. 1. The production riser is used to lift heavy loads from the ground.
   生产升降机用于将重物从地面提升。
2. 2. The production riser was designed to improve productivity in the factory.
   生产升降机的设计目的是为了提高工厂的生产效率。
3. 3. The production riser was installed in the new building, allowing for easy access to the upper floors.
   生产升降机被安装在新建筑中，便于进入上层楼层。