closed-circuit laser

例句：

1. 1. The closed-circuit laser is used to detect the presence of objects in a dark room.
   闭合回路激光用于检测黑暗房间中物体的存在。
2. 2.The closed-circuit laser was developed by scientists to improve the accuracy of medical imaging.
   闭合回路激光由科学家开发，以提高医学成像的准确性。
3. 3. The closed-circuit laser is commonly used in industrial applications for cutting and welding.
   闭合回路激光在工业应用中常用于切割和焊接。