carry indicator

例句：

1. 1. The engineer used a carrying indicator to measure the distance between the two points.
   工程师使用携带指示器测量两点之间的距离。
2. 2. The car's carrying indicator was illuminated when it reached the loading dock.
   当汽车到达装卸码头时，它的携带指示器亮了起来。
3. 3. The company introduced a new carrying indicator system to improve efficiency in inventory management.
   该公司引入了一种新的携带指示系统，以提高库存管理的效率。