beam finder

例句：

1. 1. The beam finder helped us locate the lost satellite.
   光束查找器帮助我们找到了丢失的卫星。
2. 2. The beam finder was used to track the enemy's movements.
   光束查找器被用来追踪敌人的行动。
3. 3. The beam finder was a crucial tool in our search and rescue mission.
   光束查找器是我们搜救任务中至关重要的工具。