electrostatic return beam camera tube

例句：

1. 1.The electron microscope is a powerful tool for studying the structure of matter.
   电子显微镜是研究物质结构的强大工具。
2. 2. The camera tube is the part of the camera that captures and transmits light.
   相机管是相机的一部分，它捕捉并传输光线。
3. 3.The return beam camera tube is used to detect defects in metal surfaces.
   返回束相机管用于检测金属表面的缺陷。